What is the oldest military monument in United States?

The Tripoli Monument, the oldest military monument in the United States, honors the American heroes of the First Barbary War: Master Commandant Richard Somers, Lieutenant James Caldwell, James Decatur (brother of Stephen Decatur), Henry Wadsworth, Joseph Israel and John Dorsey. It was carved in Livorno, Italy in 1806 and brought to the United States on board the famous 1797 frigate USS Constitution ("Old Ironsides"). From its original location in the Washington Navy Yard, it was moved to the west terrace of the national Capitol and finally, in1860, to the U.S. Naval Academy in Annapolis, Maryland.

The monument is made of Carrara marble with a sandstone base and measures 360 inches by 192 inches by 192 inches (9.1 m × 4.9 m × 4.9 m). It is also known as the U. S. Naval Monument, the Naval Monument, and the Peace Monument. The designer was Giovanni Charles Micali (sometimes Giovanni Carlo Micali), who signed his work as Giov. Charles Micali Invento·In Livorno 1806.

In August 1994 the Smithsonian American Art Museum noted that the Tripoli Monument needed treatment. The needed restoration of the monument was completed in June 2000.There is some conjecture that the figures of Glory, History, Commerce, and Fame are not in Micali's original positions. The adjustment may have occurred in the transition to the Capitol in 1831.