The siege of Lapa was a military confrontation involving the Brazilian Army, the National Guard, the Military Police of Paraná state and civilian volunteers, which took place during the Federalist Revolution in early 1894. The city of Lapa became the arena of a bloody confrontation between the loyalist republican troops, commonly called pica-paus (woodpeckers) against the maragatos, federalist rebels, who opposed the presidential form of government. The loyalists resisted the siege for 26 days, but succumbed due to the lack of ammunition and food.