sentences:  The Ground Echelon had arrived off North Africa in the first week of November 1942 from the United States with the Operation Torch invasion fleet.The group operated with Twelfth Air Force from January 1943 until the end of the war, flying patrol and interception missions, protecting convoys, escorting aircraft, flying reconnaissance missions, engaging in interdiction operations, and providing close support for ground forces.It operated against targets in Tunisia until the end of that campaign.