The alliance will build upon Saudi wealth, Turkish military technology, and Pakistani nuclear capabilities and battle-tested military to rewrite West Asia's security architecture.

Pakistan, Saudi Arabia, and Turkey are expected to sign a trilateral defence agreement on Friday that could fundamentally reshape West Asia's security architecture.

The three countries have finalised an agreement to create a unified and integrated security alliance across the Islamic world.

All foundational terms for the alliance have been fully drafted, communicated, and agreed upon by Pakistani, Saudi, and Turkish leaders, a senior Turkish intelligence source confirmed to CNN-News18.

Ahead of the expected signing of the pact, Pakistani Prime Minister Shehbaz Sharif and Pakistan Army chief Field Marshal Asim Munir arrived in Saudi Arabia on Thursday. Turkish President Recep Tayyip Erdogan is scheduled to arrive in the kingdom on Friday for the signing.

Since Pakistan and Saudi Arabia signed a mutual defence agreement last year, there have been reports that the two countries were interested in bringing other West Asian and South Asian nations into what has been described as an 'Islamic Nato'. If the agreement is announced on Friday, three of the largest and most influential Islamic nations will have come together to form a military bloc in a historic moment.

Alliance to build on Saudi wealth, Turkish techn, and Pakistani nukes

The Pakistan-Saudi Arabia-Turkey agreement is an organic expansion of the Saudi-Pakistan mutual defence agreement announced last year, according to CNN-News18.

As with the Pakistan-Saudi agreement, the trilateral alliance will utilise the distinct strengths of each member state to create an integrated security network.

According to CNN-News18, Saudi Arabia will contribute financial muscle, strategic depth, and regional influence; Turkey will provide advanced military technology, particularly in drones, along with a Nato-standard military-industrial base; and Pakistan will contribute nuclear capabilities and a battle-tested military.

The alliance will involve joint military exercises, technology transfers, defence-industrial production, and intelligence-sharing.

Under the Saudi-Pakistan mutual defence agreement, Pakistan agreed to deploy around 25,000 soldiers, supported by armoured, artillery, infantry, and rocket units, as well as two air force squadrons and two naval fleets, to Saudi Arabia. The deployment was intended to assist with the kingdom's security, conduct joint operations, and train Saudi forces in exchange for Saudi investments worth $10 billion.