US Approves $1B Foreign Military Sale to UK for SSN-AUKUS Submarine Systems

The US Defense Security Cooperation Agency notified Congress on March 20, 2026 of a potential $1 billion Foreign Military Sale to the United Kingdom covering key vertical payload launch system components and weapon launchers for SSN-AUKUS — the next-generation nuclear-powered attack submarine being jointly designed by the US, UK, and Australia under the AUKUS treaty. The package includes vertical deployment tubes (giving the submarine a payload module separate from torpedo tubes), common weapon launchers, software, simulation systems, and embedded technical personnel. The UK government has separately confirmed it plans to acquire up to 12 SSN-AUKUS submarines, with the first expected in the late 2030s; Australia's first domestically-built boat is due in the early 2040s. Analysts noted the sale signals sustained US commitment to the Indo-Pacific submarine architecture despite active Middle East military commitments. Australia faces a coverage gap as its aging Collins-class submarines enter life-of-type extension (LOTE) before Virginia-class transfers begin in the early 2030s.