Somoza Garcia rapidly took complete control of Nicaraguan institutions including the National Guard, promoting allies and purging enemies. The National Guard was the backbone of a growing network of control, eventually including telecommunications, railroads, and key civilian agencies from customs to hospitals to tax collection. In 1938, Somoza Garcia appointed a civilian assembly that rubber-stamped constitutional changes allowing him to stay in office; his personal fortune expanded as he and his family took over key areas of the private economy. An increasingly pervasive corruption comparable to a gangland mob, with bribery, kickbacks, and sometimes violent enforcement, protected the power of the Somoza family at all levels. The U.S. supported the National Guard through the World War II Lend-Lease act and under the terms of the Rio Treaty, but did not publicly approve of Somoza Garcia's extraconstitutional governance. The National Guard, which had been until then a predominately light infantry force composed largely of rifle companies equipped with World War I-vintage U.S. small arms, began to acquire surplus heavy equipment such as armoured cars, light tanks, transport vehicles and artillery.