Australia was one of the countries to provide combat forces for the US-led invasion of Iraq. In Australia it was known as Operation Falconer. In all Australia contributed some 2,000 personnel. The Army contribution to this was 500 soldiers. Following the end of major combat operations, Australia announced a withdrawal of most of its forces in Iraq. It left behind approximately 950 troops in the theatre. These included naval forces, support troops (such as air traffic controllers) and a security detachment of about 75 soldiers in strength to defend key Australian interests. In February 2005, Prime Minister John Howard announced an increase in the Australian presence by about 450 to provide protection for Japanese troops and assist in training Iraqi troops. This force, designated the Al Muthanna Task Group, was deployed to Southern Iraq in May 2005. After Al Muthanna province gained provincial control in mid 2006, the Australian force transitioned into a new role and was retitled the Overwatch Battle Group. OBG(W) relocated its forward operating base from Camp Smitty (outskirts of As Samawah, Al Muthanna province) to Tallil Air Base (outskirts of Nasiriyah, Dhi Qar province) effectively co-locating with the Australian Army Training Team Iraq (AATTI). Australia's contribution to operations in Southern Iraq involved combat overwatch of both Al Muthanna and Dhi Qar province, conduct of CIMIC operations and provision of support and training to the Iraqi Security Forces. After the Labor Government gained power in late 2007, most Australian forces were withdrawn from Iraq in mid-2008.