In May 2003, G squadron deployed to Iraq to replace B and D squadron at the same time they deployed around a dozen of its soldiers to Afghanistan, every 22nd SAS squadron had this deployment establishment until 2005. Also that year, it was revealed that reserve soldiers from 21 and 23 SAS Regiments were deployed, where they helped to establish a communications network across Afghanistan and also acted as liaison teams between the various political groups, NATO and the Afghan government. SAS reservists supported the British PRT in Mazar-e-Sharif that was established in July 2003 and staffed by 100 members of the Royal Anglian Regiment.