Turkish President Recep Tayyip Erdogan told Al Jazeera on Friday that Egypt is a candidate to join the landmark defence pact recently signed by Türkiye, Saudi Arabia, and Pakistan — a trilateral agreement that has already reshaped conversations about Muslim-majority military cooperation and the future of regional security architecture from Ankara to Islamabad.

The three founding members of the pact represent a combined population of roughly 380 million people, two of the world's largest standing armies, and the custodians of Islam's two holiest sites. Egypt's potential entry would add 105 million more — including the Arab world's most populous nation, the holder of the Suez Canal, and a military force that receives over one billion dollars annually in American security assistance, making Cairo's strategic calculus both consequential and complicated.

Erdogan made the comments while pledging Türkiye's continued support for the agreement, framing the pact as an open architecture rather than a closed club. 'This agreement is not limited to three countries,' he said, signalling that membership expansion is a live possibility rather than a distant aspiration.

The pact arrives at a moment of significant flux in Middle Eastern and South Asian security. Saudi Arabia is navigating a careful détente with Iran while simultaneously deepening its defence-industrial ambitions under Vision 2030. Pakistan, facing acute economic pressure and a restive western frontier, stands to gain both symbolic weight and potential materiel cooperation. Türkiye, increasingly assertive in its foreign policy from Libya to the South Caucasus, has for years pursued the role of indispensable Muslim-world broker — and this agreement is the most formal expression of that ambition yet.

Egypt's position is the most delicate variable. Cairo and Ankara spent much of the 2010s in open hostility, rooted in the Egyptian military's 2013 removal of President Mohamed Morsi — a figure backed by Erdogan's government. A diplomatic thaw that began around 2021 has gradually warmed into a functional relationship, but Egypt's deep institutional ties to Washington and its peace treaty with Israel impose real constraints on how far Cairo can lean into any alliance that Western powers may read as adversarial.

For analysts watching the broader trajectory, the more urgent question is what the pact actually obligates its members to do. Defence cooperation agreements range from intelligence-sharing frameworks to mutual defence guarantees — the difference between a diplomatic statement and a binding security commitment is enormous, and the text of the founding document has not been made fully public. What Nigerians and Africa's security planners will be watching closely is whether the pact develops a doctrine around Muslim-majority conflict zones — including in the Sahel, where Türkiye already has military a presence and where Saudi and Pakistani interests are not absent.

If Egypt joins and the pact acquires the institutional weight its founders are signalling, the world will have a new Muslim-majority defence bloc stretching from the Bosphorus to the Bay of Bengal — and the question of who it is really designed to deter will demand an urgent answer.