The Civil War Mannequins are a group of mannequins.
Night at the Museum
The Civil War Mannequins are mannequins dressed in Union Soldier and Confederate Soldier outfits.
The instructions on the Manual states for the reader to "Beware of Rifle Fire" and to "Beat the war drum. The Union and Confederate soldier will not battle if you get the beat right." The lullaby beat is
Larry had to duck the Civil War Mannequins to evade being shot.
When the Civil War Dudes were among the exhibits fighting in the lobby, Larry enlists them to help catch Cecil Fredericks, Gus, and Reginald. Despite being at war with each other, both sides were willing to follow orders. Larry officially got them to bury the hatchet after telling them that the North won the Civil War, slavery was bad (he also assured the South, who understands the outcome of the war, that they get Almond Brothers and NASCAR), and they along with all the other exhibits will no longer be alive if they don't help get the Tablet of Ahkmenrah back. They both managed to corner Gus when the attempted to make of with some treasure.
Night at the Museum: The Secret of the Tomb
The Civil War Mannesquins appered in the beginning when they start attacking as the tablet starts dying.
At the end of the film, the Civil War Soldiers are partying when the exhibits came back to life.