High Quality Content by WIKIPEDIA articles! The Douglas B-18 Bolo was a United States Army Air Corps and Royal Canadian Air Force bomber of the late 1930s and early 1940s. The Bolo was built by Douglas Aircraft Company and based on its DC-2. Although not the latest or most advanced design, the B-18 was pressed into service where it performed wartime patrol duties early in World War II. In 1934, the United States Army Air Corps put out a request for a bomber with double the bomb load and range of the Martin B-10, which was just entering service as the Army's standard bomber. In the evaluation at Wright Field the following year, Douglas showed its DB-1. It competed with the Boeing Model 299 later the B-17 Flying Fortress and Martin Model 146. While the Boeing design was clearly superior, the crash of the B-17 prototype caused by taking off with the controls locked removed it from consideration. During the depths of the Great Depression, the lower price of the DB-1 $58,500 vs. $99,620 for the Model 299 also counted in its favor. The Douglas design was ordered into immediate production in January 1936 as the B-18