The auction of Titan gear and vehicles at the Great Britain’s auction house will be broadcast live by Channel 4 News.
The £2,849m deal for the UK’s fleet of six Titan armoured vehicles is the first of its kind in the UK.
The vehicles are owned by a Japanese defence company called Mitsubishi Heavy Industries.
The deal comes after the UK government signed an agreement with the Japanese defence industry to support the UK military’s development of an indigenous vehicle and supply chain for the first time.
The vehicles will replace the ageing US Army’s M-113 Light Utility Vehicle (LUV) in the US military’s future combat fleet.
The first four vehicles to be built will be for the Royal Army’s Ranger Brigade.
The UK is now the world’s fifth largest military spender on equipment.
The vehicles are part of a deal worth an estimated £30bn to the UK by 2021.
The BBC’s Jonathan Beale reports from London.