Cover the service record of the 66th "Gypsy" Field Artillery Brigade during World War One and the history of the two French 155mm GPF guns now on museum grounds. The two regiments in the 66th (146th and 148th Field Artillery Regiments) were first formed in 1917 with National Guard units from Washington, Oregon, and Idaho. They would ultimately see more combat in 1918 than any other American outfit equipped with French 155mm cannons; the entire American military in World War One expended 264,000 rounds of 155mm artillery shells and the 66th Field Artillery Brigade accounted for over half of that number.