Don't know your M1895 "potato digger" from a Howitzer? Get the Bushmasters mixed up with the Rough Riders? Think the Buffalo Soldiers hunted buffalo? Then a trip to the Arizona Military History Museum may be in order. This award-winning museum, operated by the nonprofit Arizona National Guard Historical Society and run by the irascible and ever-knowledgeable retired U.S. Army Colonel Joe Abodeely, is located in Papago Park, in an adobe structure once used during WWII as a maintenance shop where German prisoners of war worked while being housed nearby. The museum follows Arizona's military history from the conquistadors and the Spanish Colonial Period to the U.S. Mexican War and on through to the Vietnam War and Operation Iraqi Freedom. And the many displays feature every sort of firearm, flag, and uniform imaginable, including a 19th-century belt-fed machine gun and a genuine "Huey" UH-1M Army combat helicopter flown in Vietnam. Entrance fee? Nada. Making the museum a helluva lot cheaper than a degree in military history from ASU.