Museo Histórico del Ejército Argentino, Military museum in Caseros, Argentina.

The Museo Histórico del Ejército Argentino is a military museum in Caseros, Argentina, displaying vehicles, artillery pieces, and weapons from different periods of Argentine military history. The grounds include both indoor rooms and outdoor areas where larger equipment is on show.

The museum occupies the Cuarteles de Liniers in Ciudadela, built on land that belonged first to the Jesuits and later to the Real Colegio de San Carlos and the Colegio Nacional de Buenos Aires. The national government took the land at the end of the 19th century for army barracks, completed in 1904; the crenellated buildings beside the entrance arch gave the locality its name, Ciudadela. After the GA 1 moved to Campo de Mayo and the GADA 101 was deactivated in 1991, the empty site was recommended for a museum, and the Museo Histórico del Ejército was created on 13 May 1993.

The collection shows uniforms, personal gear, and photographs that trace how Argentine soldiers were equipped across different eras. Visitors can follow the changes in arms and equipment from the early forces to the present day.

The museum has both indoor rooms and large outdoor sections, so comfortable shoes and enough time are helpful. Since the display areas are spread out, starting with the outdoor grounds helps pace the visit well.

The Sala Policía Militar traces the Military Police branch from its distant origins to its last mission in the 1982 Falklands War, displaying its weapons, vehicles, uniforms and flags. Its displays were assembled with the testimony of the personnel who took part, who are presented as the direct witnesses behind the room.