Operation Telic (Op TELIC) was the codename under which all of the United Kingdom's military operations in Iraq were conducted between the start of the invasion of Iraq on 19 March 2003 and the withdrawal of the last remaining British forces on 22 May 2011. The bulk of the mission ended on 30 April 2009[1][2] but around 150 troops, mainly from the Royal Navy, remained in Iraq until 22 May 2011 as part of the Iraqi Training and Advisory Mission.[3][4] 46,000 troops were deployed at the onset of the invasion and the total cost of war stood at £9.24 billion in 2010.[5]