The military fights wars, and that's bound to have created a few vengeful spirits over the last few centuries.
Here are 5 stories of these sorts of mil-ghosts from around the webs. (And if you have any cool ones, share them in the comments.)
Listen to our veteran hosts discuss haunted bases and urban legends in the U.S. military.
1. The combatants from Little Big Horn are still fighting.
The U.S. Army's "Soldier's Creed" calls for troops to never quit, never accept defeat. Apparently Maj. Gen. George Armstrong Custer and his men got the message 127 years before the Soldier's Creed was written, because they're still fighting the lost Battle of Little Bighorn.
The story goes that visitors have seen spirits moving around the battlefield, and at least one has seen U.S. soldiers and Native American warriors fighting to the death.
2. A Revolutionary War general rides through Pennsylvania trying to find his missing bones.
We've previously discussed Maj. Gen. "Mad" Anthony Wayne and the fact that he's buried in at least two places. Wayne died while touring military defenses in Pennsylvania and was buried near Lake Eerie. When his son came to recover the body twelve years later, he found that Lake Eerie had preserved the body.
Since the younger Wayne only had room for his dad's skeleton, he had the flesh boiled off and then moved the bones across the state in a cart. The story goes that he lost a few pieces along the way. "Mad" Anthony Wayne's ghost still rides the trail, trying to recover the bones his son scattered like some kind of sick Johnny Appleseed.
3. An Air Force base's security headquarters has a helpful ghost nurse.
Look, few people particularly love military police and security forces, but they provide a needed service. It's sort of rude to put their headquarters in a haunted building, but that's what happened at Warren Air Force Base, Wyoming.
Building 34 used to be the base hospital, and supposedly a nurse still roams the halls and tries to do her job. No word on how many sleeping staff runners have been woken up with ectoplasm IVs, so we have to assume more than 20.
4. A group of fiery monks protect the Alamo.
After Santa Anna's forces finally captured the Alamo, Mexican forces had to decide what to do with it. They decided to raze it to the ground in an effort led by Gen. Juan Jose Andrade. Andrade sent a colonel who attempted to complete the mission, but came running back, babbling about ghost monks.
Andrade went to destroy the chapel and remaining fortifications himself with a cannon and torches. When the general and his men arrived, they took aim at the chapel doors. Six monks with flaming swords walked out of the walls of the chapel. As they and other spirits began hurling fireballs at the Mexican soldiers, the general ordered a tactical retreat.
5. USS Hornet is the most haunted ship in the Navy fleet.
The USS Hornet saw extensive service in World War II and the Vietnam War, and so it's no surprise that a couple of ghosts may have decided to make it home.
It has a reputation as an extremely haunted place though. Visitors to the museum regularly report seeing officers in their blue uniforms or a sailor wearing his dress whites. (No one knows why an eternal spirit would decide to spend his time looking like the Cracker Jack mascot.)