In 1927, General Hanson Edward Ely commenced a major program to build several mostly Georgian revival structures on Governors Island. The new structures included a movie theater, a YMCA, an "officer's club", and a public school. The three-story Liggett Hall (also known as Building 400), a military barracks spanning nearly the entire width of the original island, was built on the site of former World War I warehouses, and was one of the world's largest barracks upon its completion in 1928. Afterward, the Army hired McKim, Mead & White to build a "barracks district" near Liggett Hall. During the 1930s, the Works Progress Administration landscaped much of the island and reinforced many existing structures, hiring up to 5,000 workers in the process. Some of the WPA's projects included the restoration of the General's House, as well as the eradication of invasive Japanese beetles. The Army also incrementally repaved Governors Island's roads so they could accommodate modern vehicles, and constructed garages.