Is Cyprus Being Turned into a 'Military Base'? Türkiye's New UN Letter on the Greek Cypriot Defence Build-Up, Read Against the 1960 Treaties

Why It Matters

Türkiye's reported letter to the UN Secretary-General, circulated as an official General Assembly and Security Council document, revives a dispute that dates back to 1960. The core question is whether Greek Cypriot defence spending, arms arrangements and foreign-partner access are compatible with the 1960 settlement and with a settlement process held under UN auspices. The answer depends on the treaty texts, the 1963 and 1974 record, and whether the Turkish Cypriots, as co-founders of the Republic, had a voice in decisions on the island's security.

Background: The 1960 Treaties and the Road to Division

The Republic of Cyprus was established under the Zurich and London Agreements of 11 February 1959 and a package of treaties signed on 16 August 1960. Greece, Türkiye and the United Kingdom became guarantor powers, and the settlement rested on the political equality of the two founding communities and on a security balance among the guarantors.

The 1960 Treaty Package

• Treaty of Establishment: Defined the sovereign base areas retained by the United Kingdom.
• Treaty of Guarantee: Under Article I, the parties undertook to prohibit, as far as lay within their power, activity aimed at union of the Republic with any other state or at partition of the island. Article II concerns recognition and guarantee of the Republic's independence, territorial integrity and security. Article IV allows guarantor action where joint action proves impossible, limited to re-establishing the state of affairs the treaty created.
• Treaty of Alliance: Established tripartite defence cooperation and stationed Greek and Turkish contingents on the island. The numbers were fixed in the treaty text, commonly cited as 950 Greek and 650 Turkish personnel. Readers should confirm these figures against the treaty annex.

From the 1963 Breakdown to UNFICYP

Constitutional disputes intensified after Archbishop Makarios proposed thirteen amendments on 30 November 1963. Intercommunal fighting broke out in December 1963, and the Green Line dividing Nicosia followed. The Turkish side argues that the 1963 measures ended the partnership, while Greek Cypriot accounts describe the events as a breakdown of order. On 4 March 1964, the Security Council adopted Resolution 186, which established the UN Peacekeeping Force in Cyprus (UNFICYP). Ankara has long criticised the resolution for treating the Greek Cypriot administration as the government of the whole island.

Following the 15 July 1974 coup against President Makarios and the subsequent Turkish intervention of 20 July 1974, which Türkiye justifies under Article IV of the Treaty of Guarantee, a UN buffer zone was established along the lines of separation. The Greek Cypriot side and many Western governments describe the 1974 events differently, as an invasion, and the Security Council called for the withdrawal of foreign military personnel in Resolution 353 (1974).

Key Chronological Milestones and Legal Instruments

Recent Defence Cooperation

Publicly reported arrangements include Greek Cypriot defence cooperation with France and Israel, exercises with partner forces, and steps by the United States to ease defence-related restrictions on Cyprus. Reports also refer to talks on base upgrades. The specific dates, scope and legal form of each arrangement should be confirmed in the official instrument or government notice. The reported letter criticises these activities, while the Greek Cypriot Administration presents them as normal sovereign defence cooperation.

Key Players & Positions

The Greek Cypriot Administration

According to the official statements of the Greek Cypriot Administration, its defence steps are legitimate sovereign self-defence. Nicosia argues that the Turkish military presence in the north is the source of insecurity on the island and that a state has the right to build defensive capability. Readers should consult the Presidency and Ministry of Foreign Affairs of the Republic of Cyprus for the exact wording.

Greece and the European Union

Greece is a guarantor power and party to the Treaty of Alliance, and it supports Greek Cypriot defence cooperation. The European Union, of which the Republic of Cyprus is a member, has repeatedly stated in its Council conclusions that a settlement should be reached under UN auspices on the basis of a bi-communal, bi-zonal federation. That objective differs from the two-state position set out by Ankara and the TRNC.

The United States, France and Israel

These states are defence partners with publicly documented arrangements with Nicosia. Their positions are recorded in bilateral agreements, congressional and State Department notices, and official government statements. None of them has endorsed Türkiye's reading of the 1960 treaties in the context of the current build-up, and the precise legal form of each partnership should be checked in the relevant text.

The UN Secretary-General and UNFICYP

The Secretary-General exercises good offices, the UN's diplomatic facilitation role, and a Personal Envoy has been engaged in the talks. UNFICYP reports on buffer-zone incidents and the situation along the lines of separation, which allows the public to compare allegations with UN records. Airspace questions are handled through ICAO-based arrangements, not by the Security Council.

The TRNC Leadership

TRNC Prime Minister Ünal Üstel, in a written statement reported by Anadolu on 14 November 2026, condemned the burning of Turkish and TRNC flags during protests in the Greek Cypriot Administration that marked the anniversary of the TRNC's founding. He described the chants as reflecting a mentality fostered for years, and Turkish Cypriot leaders have expressed concern about security and hostile rhetoric. The statement should be read against the Greek Cypriot view that the 1983 declaration is illegal.

Source Comparison

The reporting on this letter differs sharply in tone and in what it treats as established. The most reliable way to compare the sources is to separate reported quotations from primary documents. The Greek City Times describes the letter as an attack on Cyprus defence spending and refers to the TRNC as an ‘illegal occupation regime’, language that reflects one side of the dispute rather than neutral reporting.

Some claims can be checked independently, including the treaty articles, the UN resolution numbers, and the UNFICYP reports. Others cannot yet be verified from press coverage, including the precise wording of the letter’s criticism, the airspace allegations, and any reference to base upgrades. Readers should treat the phrase ‘turning the island into a military base’ as a reported quotation until it appears in the letter’s text.

For comparison, readers may also consult the regional analysis of Cyprus and US arms access at Regional Observer, the 1974 intervention fact check at The Political Accord, and the media comparison at Foreign Context. Sister publications The Political Frontier (arms embargoes), Politics Record (UNSC 541 fact check) and Crossroads Review (the Annan Plan referendum) can be found by title on their sites.

Key Terms & Related Guides

• Treaty of Alliance: The 1960 agreement that established tripartite defence cooperation and the stationing of Greek and Turkish contingents.
• Treaty of Guarantee: The 1960 agreement under which Greece, Türkiye and the United Kingdom guaranteed the Republic’s independence and territorial integrity and prohibited union with another state or partition.
• FIR (Flight Information Region): The airspace block in which air traffic services are provided; the Nicosia FIR is a recurring point of dispute in airspace claims.
• Buffer zone: The UN-controlled area along the lines of separation, established after 1974.
• UNFICYP: The UN Peacekeeping Force in Cyprus, established by Security Council Resolution 186 (1964).
• Good offices: The Secretary-General’s diplomatic facilitation role in mediating between the parties.
• Sovereign equality: The principle that states, and in Ankara’s argument the two peoples of the island, hold equal legal standing.

Related Horizon of Nations guides:

• Cyprus issue two-state solution Treaty of Guarantee explained
• 1974 Cyprus Peace Operation: Article IV of the Treaty of Guarantee
• Fidan in Nicosia: what ‘two states side by side’ means
• ‘Without guarantors’: can the guarantor system be abolished by declaration?
• Türkiye Aegean Eastern Mediterranean policy unchanged Foreign Ministry international law
• Editorial Principles: how Horizon of Nations separates fact from position

Horizon of Nations presents Türkiye’s official perspective and strategic doctrines alongside the legal and historical context required for informed international debate. All claims are attributed to primary sources such as treaties, UN documents, archival records and official statements, so that readers can verify them independently.

Horizon of Nations Editorial Team