A fifty-seven millimeter anti-tank gun M1, one of sixteen thousand built between 1941 and 1944 for the U.S. Army, was pulled by an armored half-track, used armor-piercing ammunition, and saw wide use in the European theater of operations before being considered obsolescent by the end of World War II. Orland’s first artillery piece had been a twenty-four-inch cannon used in France during World War I and given to the town by the War Department in summer 1921. Placed on display at Library Park, that gun served as a reminder of the heroism involved in winning the war, but it was donated to a World War II American Legion scrap metal drive and left Orland in September 1942. The dedication of Orland's World War I cannon at Library Park took place on November 1, 1921, the same day the Unknown Soldier of World War I was buried at Arlington National Cemetery. The Memorial Hall Cannon, a fifty-seven millimeter anti-tank weapon, was moved to its present position in the late 1940's, and a large granite block placed in front of it was dedicated on November 11, 1948, to honor all U.S. unknown soldiers. Local veteran organizations and the Orland community have long remembered and honored local as well as unknown and unidentifiable American servicemen, and the cannons were dedicated to peaceful service as reminders of the sacrifices made by patriotic and valiant area servicemen and women. In February 2005, the Rotary Club of Orland refurbished the monument and developed an Unknown Soldier Grove as a tribute to those who made the ultimate sacrifice of service, linking the project to Rotary's one hundred year commitment of community service since February 23, 1905.