In 1777, the company joined the Continental Army to fight the British in the American Revolution, although it was not obligated to do so. Since that time, the company has been involved in every war in which the United States has been involved.
The Footguard Building is technically an armory, with a large open room known as a drill shed for its main space. The drill shed is surrounded by the second-floor balcony. The balcony is lined with wooden plaques commemorating the Guard's activities over the years, including escorting Lafayette, marching at the dedication of the Washington Monument, and participating in the funeral of former President Ulysses S. Grant.
The building was also used for public events until well into the twentieth century. It occupies a prominent location on High Street, a location which was even more prominent before the construction of I-84. Nowadays, the building houses a small museum which details the long history of the Footguard and is listed on the National Register of Historic Places.