Saudi Arabia has embarked on a significant expansion of its defence relationships with key partners, a suite of agreements that analysts say could materially alter the security landscape across the Middle East and South Asia.

At the centre of these developments is the ‘‘Strategic Mutual Defence Agreement’’ signed in Riyadh in September 2025 between Saudi Crown Prince Mohammed bin Salman and Pakistan’s Prime Minister Shehbaz Sharif, under which any act of aggression against either country is to be treated as aggression against both, formalising a collective security pledge with potential implications for regional deterrence and alliance structures.

Under the pact, the two countries commit to enhanced cooperation on military planning, intelligence sharing and joint exercises, and observers note that it signals Riyadh’s intent to diversify its security partnerships at a time when traditional reliance on Western guarantees faces new strains amid broader geopolitical tensions.

The agreement has drawn attention not only because of its collective defence clause but also because Pakistan’s status as a nuclear-armed state could, in practice, extend a deterrent umbrella that alters conventional calculations for rival capitals across the region.

In addition to its pact with Islamabad, Saudi Arabia is deepening defence ties with Türkiye and sophisticated defence manufacturers.

Agreements with Turkish firms such as Nurol Makina, FNSS and Aselsan focus on technology transfers and localisation of advanced land systems under the Saudi Arabian Military Industries (SAMI) programme, advancing Riyadh’s drive to boost its domestic defence industrial base.

These partnerships are expected to enhance the Kingdom’s long-term self-sufficiency in armoured vehicles, electronics and weapons systems while embedding Riyadh more firmly in wider Eurasian defence technology networks.

Saudi Arabia has also sustained and renewed cooperative security engagements with Gulf Cooperation Council states, exemplified by ‘‘Gulf Shield 2026,’’ a joint military exercise designed to enhance interoperability among Saudi, UAE, Qatari, Kuwaiti, Bahraini and Omani forces.

Such multinational exercises underline the continued importance Riyadh places on conventional collective readiness.

Taken together, these pacts and initiatives reflect a pragmatic Saudi strategy to bolster deterrence, acquire advanced capabilities and reduce dependence on any single external sponsor of its security.

They come at a time of concern over threats emanating from Yemen’s southern theatres, tensions with the United Arab Emirates over influence in the Red Sea and Horn of Africa, and broader anxieties about Israel’s growing military posture following regional conflicts.

While the immediate operational impact of these defence arrangements will unfold over time, their symbolic and strategic resonance is already being felt across capitals in West Asia, South Asia and beyond as states recalibrate their alliances in response to a more assertive Riyadh seeking stability and strategic autonomy in a shifting regional order.