What years was the us army stationed at the panama canal?

The U.S. Army was stationed at the Panama Canal from its construction in the early 1900s until the end of U.S. control over the canal in 1999. The construction officially began in 1904 and was completed in 1914, with a military presence maintained throughout the years. The U.S. military presence was formalized under the Hay-Bunau-Varilla Treaty, and it continued until the Panama Canal Treaty of 1977 established a timeline for the eventual transfer of control to Panama by December 31, 1999.