They left behind hundreds, possibly thousands of Armoured Personnel Carriers, which were widely used by US forces, as well as the Afghan Army and police. In addition, hundreds of Russian-made combat helicopters, which they bought on the cheap for the Afghan Army, who, despite being given billions of dollars worth of training and weapons by the US, offered no resistance as the Taliban made its advance in summer 2021.
OPINION: What are US troops doing in the Middle East and where are they?