The Museo de Armas, often referred to as the military museum, adds a martial and political layer to Santa Ana's more familiar theatre, cathedral, and coffee-country sights. Displays typically focus on weapons, uniforms, and military history rather than polished multimedia interpretation.
It is best for travellers already interested in El Salvador's turbulent twentieth century. Allow a short visit, and pair it with the historic centre so the museum's material sits in a wider civic context.