Operation Diesel was a raid by 700 British troops from the Royal Marines 45 Commando, 42 Commando, and the 3 Commando Brigade's Reconnaissance Force, as well as armoured infantry and close reconnaissance from 1st Battalion Princess of Wales's Royal Regiment (1 PWRR) on a Taliban drug factory and arms stronghold in the Upper Sangin Valley in Helmand province, Afghanistan on February 7, 2009. According to the UK, the raid captured four drug factories and heroin and opium worth £50 million.