The Mitchell B-25 is the best known and most important medium bomber of WWII. It was also effective in low-level strafing attacks, using many machine guns to obliterate targets on land and at sea. Although it was operated mainly by the U.S. Army Air Corps, it was also flown by the U.S. Navy and Marine Corps. Thanks to its durability and dependability, the B-25 flew in all climates, against all enemies and in virtually every theatre of WWII. Characterized by its mid-mounted gull wings with engine nacelles beneath, oval fuselage cross-section, twin vertical tails, tricycle landing gear, and greenhouse-style canopy, the B-25 Mitchell was the most widely used and recognized medium bomber of the era.