The Boeing B-17 Flying Fortress is a four-engine heavy bomber aircraft developed in the 1930s for the United States Army Air Corps (USAAC). The B-17 was primarily employed in the daylight precision strategic bombing campaign of World War II against German industrial and military targets. The B-17G is generally considered the definitive B-17 design, incorporating all changes made in the B-17F. A Bit o Lace is possibly the most famous B-17G ever It flew 83 missions over Europe, and featured art by cartoonist Milton Caniff as a decoration.