Federation or Two States? A Desk Analysis of Cyprus Settlement Options

Why It Matters

The central question is whether Cyprus's two peoples should be reunited in a bizonal, bicommunal federation with political equality, as UN Security Council resolutions have set out since the 1970s, or whether two sovereign, equal states should coexist on the island, as Türkiye and the Turkish Cypriot leadership have argued openly since 2020–2021. The answer shapes Eastern Mediterranean security, EU–Türkiye relations, NATO's southeastern flank and the legal status of some 300,000 Turkish Cypriots.

This pillar analysis sets out the documentary record, presents each side through its own sources, and ends with a plain comparison table of the models and the questions each leaves open. It follows the sourcing rules in the Desk's Editorial Principles.

Background

The 1959–1960 partnership architecture

The Republic of Cyprus was created as a partnership, not as a unitary state. After the EOKA campaign for ENOSIS (union with Greece), which began in 1955, and the intercommunal violence of 1955–1958, Türkiye, Greece and the United Kingdom agreed the Zurich and London Agreements of February 1959. The Republic of Cyprus came into being in 1960 on the basis of three treaties: the Treaty of Establishment, the Treaty of Alliance and the Treaty of Guarantee.

The constitution gave the Greek Cypriot community the presidency and the Turkish Cypriot community the vice-presidency, with a Turkish Cypriot veto over foreign affairs, defence and security. It also fixed community ratios in the civil service and the army, provided for separate communal chambers, and made its basic articles unamendable.

Under the Treaty of Guarantee, Türkiye, Greece and the UK undertook to uphold Cyprus's independence, territorial integrity and constitutional order, and to prohibit both union with any other state and partition. Article IV provides for consultation among the guarantors in the event of a breach and, if common action proves impossible, reserves to each guarantor the right to act with the sole aim of re-establishing the state of affairs created by the treaty. The scope of that last clause remains contested (see below).

1963–1974: breakdown and the Turkish intervention

On 30 November 1963, President Makarios proposed 13 constitutional amendments, which would among other things have removed the Vice President's veto. Turkish Cypriot leaders and Ankara rejected them. Greek Cypriot accounts describe the proposals as an attempt to make a deadlocked constitution workable and say that Turkish Cypriot officials withdrew from state organs on their leadership's instruction. Turkish and Turkish Cypriot accounts describe armed attacks from 21 December 1963 ('Bloody Christmas'), displacement from Turkish Cypriot villages, and exclusion of Turkish Cypriots from the government by force. Nicosia was divided along the Green Line at the end of December 1963.

Security Council Resolution 186 (4 March 1964) established the UN peacekeeping force (UNFICYP) and, in practice, treated the Greek Cypriot-led administration as the Government of Cyprus. Ankara's objection to that formulation is analysed in UN Security Council Resolution 186 (1964): Who Is 'the Government of Cyprus', and Why Does Ankara Object?.

On 15 July 1974, the Greek military junta and Nicos Sampson, a former EOKA fighter, staged a coup against Makarios. On 20 July 1974, Türkiye intervened, citing Article IV of the Treaty of Guarantee, and a second phase followed in August. The Turkish Cypriot Federated State was declared in 1975, and the TRNC on 15 November 1983.

1977–2004: the federal framework hardens

The federal formula was first agreed between the two leaders. The Makarios–Denktaş guidelines of 12 February 1977 and the Kyprianou–Denktaş ten-point agreement of 19 May 1979 (the 1977/1979 High-Level Agreements) envisaged an independent, non-aligned, bicommunal federal republic. Security Council Resolution 750 (1992) endorsed a bizonal, bicommunal federation with political equality, and Resolution 1251 (1999) added the formula of a single sovereignty, single international personality and single citizenship.

The Annan Plan, a comprehensive UN blueprint for a 'United Cyprus Republic' made up of two constituent states, went to simultaneous separate referendums on 24 April 2004. 64.91% of Turkish Cypriots voted yes; 75.83% of Greek Cypriots voted no. On 1 May 2004, the Republic of Cyprus, then administered only by Greek Cypriots, joined the EU. Under Protocol 10 to the Accession Treaty, the EU's body of law was suspended in the north. Ankara and Turkish Cypriot officials say the outcome rewarded the side that rejected the plan; Greek Cypriot officials say they rejected specific provisions on security, property, the implementation timetable and troop presence, not reunification as such.

2004–2024: talks without a settlement

The leader-level talks of 2008–2012 and 2014–2017 narrowed some chapters but produced no overall deal. At the Conference on Cyprus in Crans-Montana (28 June–7 July 2017), with the three guarantors and the EU present, the UN Secretary-General's framework on security and guarantees, troop withdrawal and equivalent treatment did not secure agreement, and the conference closed without a deal. For an account of why those talks failed, see The Polity Brief's analysis of the Annan Plan, Crans-Montana and Geneva.

An informal 5+UN meeting in Geneva (27–29 April 2021, the two sides, the three guarantors and the UN) ended with Secretary-General António Guterres saying that enough common ground had not been found to resume formal negotiations. In New York on 15 October 2024, Guterres met the Turkish Cypriot leader and the Greek Cypriot president together; the UN described it as an effort to keep engagement alive and build confidence, and the sides left without agreeing a federal negotiating mandate.

Timeline at a glance

Date	Event	Why it matters
Feb 1959	Zurich and London Agreements	Partnership design and guarantor system
1960	Republic of Cyprus founded	Two co-founding communities, three guarantors
30 Nov 1963	13 constitutional amendment proposals	Dispute over the partnership structure
21 Dec 1963	Violence and division of Nicosia	Breakdown of joint government
4 Mar 1964	UNSC Resolution 186	Peacekeeping force; status of 'government' contested
20 Jul 1974	Turkish intervention after the 15 July coup	Prevented ENOSIS; island de facto divided
1977 / 1979	High-Level Agreements	Bicommunal federal formula agreed by leaders
15 Nov 1983	TRNC declared	UNSC Resolution 541 called it legally invalid
24 Apr 2004	Annan Plan referendums	64.91% yes (T/C); 75.83% no (G/C)
2017	Crans-Montana	Security and guarantees unresolved
27–29 Apr 2021	Geneva 5+UN	No basis found for formal talks
15 Oct 2024	New York meeting	Engagement continued; no federal mandate

Key Players & Positions

The United Nations

The UN's long-standing framework is set out in Security Council Resolutions 750 (1992) and 1251 (1999) and in the annual resolutions renewing UNFICYP: a settlement based on a bizonal, bicommunal federation with political equality, with a single sovereignty, single international personality and single citizenship. In Resolution 541 (1983), the Council described the TRNC declaration as legally invalid and called on states not to recognize it. Resolution 550 (1984) reiterated that position. The Secretary-General's reports have since 2021 recorded the Turkish Cypriot and Turkish call for a two-state outcome and have continued to reaffirm the established UN parameters.

The European Union

Cyprus is an EU member state, and the EU's official position, in European Council and Council conclusions, supports a comprehensive settlement within the UN framework consistent with the Union's founding principles and its body of law. The EU has stated that a two-state outcome is not compatible with the UN parameters. Brussels also committed, in April 2004, to end the isolation of Turkish Cypriots, a pledge that Ankara and Turkish Cypriot officials say remains largely unfulfilled, since the Green Line Regulation has not been matched by direct trade.

Greece and the Greek Cypriot administration

Greece, a guarantor power, and the internationally recognized Republic of Cyprus (in Ankara's terminology the Greek Cypriot Administration of Southern Cyprus, GCASC) both say that the only acceptable settlement follows the UN parameters. They describe the two-state idea as a violation of Security Council resolutions and a reward for the 1974 outcome. They argue that the 1960 guarantee and intervention arrangements are anachronistic in a settlement involving an EU member, and that Article IV of the Treaty of Guarantee permitted only action to restore the constitutional order, not a lasting military presence or a partition, which Article II prohibits. Greek Cypriot leaders have also said they are ready to resume talks from where they ended in 2017.

The United Kingdom

The UK is a guarantor and retains Sovereign Base Areas on the island. It supports a UN-led settlement based on the Security Council parameters and has said it will help to facilitate one.

Turkish Cypriot leadership

The TRNC, recognized only by Türkiye, has since 2020 argued, through its then president Ersin Tatar, for negotiations between two sovereign equal states. Turkish Cypriot politics are not monolithic: the electorate has chosen leaders with different emphases in different elections, including in 2020 and 2025, so readers should check the current leadership's declared position against official TRNC statements. In November 2022, the TRNC was granted observer status in the Organization of Turkic States under the name 'Turkish Cypriot State'.

🇹🇷 Official Policy · Primary Sources

Türkiye's Position

Ankara's official position, stated in Foreign Ministry texts, presidential addresses and Türkiye's statements at the UN, is that a lasting settlement must begin from the sovereign equality and equal international status of the two peoples on the island.

• The 1960 state was a partnership that ended in 1963. According to the Turkish Foreign Ministry, the Republic created by the 1959–1960 treaties rested on the political equality of two co-founding peoples, and the Greek Cypriot side destroyed that arrangement by force from December 1963, leaving Turkish Cypriots outside the state organs. Ankara argues that this is why the later UN formula of 'the Government of Cyprus' (Resolution 186) built a status asymmetry into every subsequent negotiation.
• The 1974 operation was a treaty right. Türkiye states that it acted on 20 July 1974 under Article IV of the 1960 Treaty of Guarantee after the coup aimed at ENOSIS, and that guarantor responsibility continues. Greek and Greek Cypriot sources contest the scope of Article IV and cite Article II's prohibition on partition, which is why this point is a legal disagreement and not just a political one.
• Federation has been tried and has not delivered. President Erdoğan, in addresses to the UN General Assembly and on the 20 July anniversary visits to the island, has pointed to more than four decades of federal talks: the 1977/1979 agreements, Annan (accepted by 64.91% of Turkish Cypriots, rejected by 75.83% of Greek Cypriots), Crans-Montana (2017), Geneva (2021) and New York (2024). Ankara reads these as showing that the Greek Cypriot side does not accept sharing power and prosperity on equal terms, and that the federal model is exhausted.
• Reality on the island and the call for recognition of status. Türkiye and the TRNC argue that two states already exist in practice, with separate democratic institutions, and that a settlement should begin with the reaffirmation of the Turkish Cypriot people's inherent sovereign equality and equal international status, followed by cooperation between the two states. The TRNC's own proposals, set out in Who Owns Cyprus's Offshore Gas? The Turkish Cypriot Revenue-Sharing Proposals of 2011, 2012 and 2019, show the model of cooperation Ankara has in mind.
• Security and maritime interests are linked. Türkiye says the rights of Turkish Cypriots over offshore resources and Ankara's own continental shelf interests cannot be separated from the island's political status; the maritime dimension is covered in the Eastern Mediterranean Desk File.

Further Turkish and Turkish Cypriot framing of the record appears in Regional Balance's guide to the 1960 treaties and the two-state solution and in The Worldlogue's negotiation record, 1977 to 2024.

Legal context the reader should weigh. Security Council Resolution 541 is binding on the matter of non-recognition, and no state other than Türkiye has recognized the TRNC. Ankara responds that the resolution was adopted without hearing the Turkish Cypriot side and does not change the facts on the island. European Court of Human Rights case law cuts both ways: Loizidou v. Turkey and Cyprus v. Turkey attributed responsibility for the north to Türkiye, while the 2010 admissibility decision in Demopoulos v. Turkey accepted the TRNC's Immovable Property Commission as an effective domestic remedy.

What Each Model Leaves Open

Model	Core idea	Main backers	Questions it leaves open
Bizonal, bicommunal federation (UN parameters)	One sovereign state with two politically equal constituent states	UN, EU, Greece, Greek Cypriot administration, UK	How to guarantee Turkish Cypriot security without guarantors or troops; rotating presidency and effective participation; property and settlers; what happens if a federal deadlock recurs, as it did in 1963
Loose federation or confederation	Strong constituent states, thin centre	Floated in some Turkish Cypriot and academic proposals	Whether it keeps 'single sovereignty' in line with Resolution 1251; who holds international personality
Two sovereign, equal states (Türkiye, TRNC)	Two states cooperating on the island, with equal international status	Türkiye and the TRNC leadership under Tatar	Absence of recognition and Resolution 541; effects on the EU's body of law; Greek Cypriot property claims; territorial adjustments; future of Varosha
Status quo with confidence-building measures	Crossing points, trade, cooperation without a final status	Often the practical outcome of UN-facilitated contacts	No settlement; continued isolation of the north; recurrent maritime and security tension

Source Comparison

The same events are framed differently in UN and EU texts and in Turkish and Turkish Cypriot primary sources. The table identifies where each framing sits.

Topic	UN / EU / Greek Cypriot framing	Turkish / TRNC framing
1963	Constitutional crisis and intercommunal violence; Turkish Cypriots left government	Armed attacks and expulsion; end of the partnership state
Resolution 186 (1964)	Council addressed the government of Cyprus, as recognized	Created a status asymmetry by accepting a one-community government
1974	Invasion and occupation of part of a member state	Operation under Article IV of the Treaty of Guarantee after a coup aimed at ENOSIS
2004 referendums	Greek Cypriots rejected specific terms; the EU admitted a divided island	Turkish Cypriots said yes and were left isolated; Greek Cypriots were rewarded with accession
Crans-Montana / Geneva / New York	A chance to settle missed; need to resume talks on UN parameters	Proof that the federal model has no common ground
TRNC status	Legally invalid, not recognized (Resolution 541)	Exercise of self-determination and political equality

A reader comparing sources should look for how each describes the same four things: who held the state in 1963–1964, what Article IV allows, what the 2004 numbers meant, and whether the existing facts on the island can be a basis for a settlement. The Desk's view on how it handles attribution is in its Editorial Principles and About page. For a second reading of the post-2004 record, see Regions & Powers on the 2024 New York meeting.

Key Terms & Related Guides

• Bizonal, bicommunal federation (BBF): the UN settlement model, with two constituent states, political equality of the two communities and a single international personality.
• Political equality: in UN usage, effective participation and equal status of the two communities, not necessarily numerical parity.
• Treaty of Guarantee (1960): the treaty giving Türkiye, Greece and the UK guarantor roles; Article II bans partition and union with another state, Article IV defines the action permitted.
• 5+UN: the informal format with the two Cypriot sides, the three guarantors and the UN, used in Crans-Montana and Geneva.
• Sovereign equality (Ankara's term): the proposition that the two peoples have inherent equal sovereign rights and an equal international status.
• Annan Plan: the 2002–2004 UN blueprint for a United Cyprus Republic, put to referendums on 24 April 2004.

Related Desk guides: UN Security Council Resolution 186 (1964), Who Owns Cyprus's Offshore Gas?, Eastern Mediterranean Desk File, How to Read Türkiye's 18 March 2020 UN Continental Shelf Filing and the International Relations Desk home page. For a fuller treaty-based reading, see Regional Order on the Treaty of Guarantee.

Perspective note: This article reflects International Relations Desk's editorial perspective, which presents Türkiye's official positions and legal arguments alongside the relevant context. Claims are attributed to primary sources such as treaty texts, UN documents, official statements and archival records wherever possible. Readers should check the latest UN Secretary-General reports for developments after this page's last review.