New York to the UK in the summer of 1919. Hensley was then sent on a confidential mission to contact the Zeppelin Company to attempt to purchase the remaining undelivered wartime Zeppelin, the L 72. The scheme probably originated with General "Billy" Mitchell. Hensley visited the Zeppelin plant, inspected L 72 and flew on the Bodensee, a small passenger Zeppelin. The Inter-Allied Commission of Control ordered that L 72 should be turned over to France. In November 1919 the US Army contracted with the Zeppelin corporation for construction of the LZ 125, which was to be larger than the R38 class airship which the USN had contracted to purchase from Britain as the ZR-2. This attempt to avoid the conditions set by the Joint Airship Board would have encountered legal problems as the US Senate refused to ratify the Allied Peace Treaty with Germany until October 1921. Complaints by the Secretary of the Navy resulted in the Secretary of War ordering the German contract terminated in December 1919. Interwar years Following the end of World War I, the U.S. Army acquired a variety of blimps from US, French and British sources. Plans were made for operating airships from both Fort Bliss and Brooks Field, in Texas and Langley Field, Virginia. The first blimp operated by the Army was the A-4, which was operated primarily from Langley until transferred to the new Balloon and Airship School at Scott Field, Illinois. The Army operated several Navy C class blimps and D class blimps during the immediate post-World War I era. Army blimps participated in the "Mitchell" bombing test in 1921. They were used for training, coastal patrol, and experimentation in the early 1920s. The Army purchased three British SST class blimps from the British, which were operated out of Biggs Field, Fort Bliss, and Brooks Field, both in Texas for purposes of border patrol between 1920 and 1923. During the 1920s the Army developed several "Motorized Observation Balloons". The OB-1 and MB were intended to fly to where needed, and then be tethered as observation balloons. The US Army acquired the Italian semi-rigid airship Roma in 1921. The Roma was the largest airship ever operated by the Army and was based at Langley Field. With a cruising speed of 50 mph and a range of 7,000 miles, the Roma allowed the Army to consider transcontinental deployments, missions to Panama, the fast transport