The Battle of Arica is a historical event and national holiday that is celebrated in Peru annually. The holiday commemorates a key battle fought at Arica during the War of the Pacific, between Peru and Bolivia against Chile. The battle occurred on June 7, 1880, a date now recognized and celebrated every year as the symbol of Peruvian bravery and resilience during arguably one of the most significant wars in South American history.

This Peruvian holiday is marked by various activities, particularly in the city of Arica. A featured event is a military parade with the march of soldiers, naval personnel, and war veterans usually held at Peru's Monumental Complex of the Battle of Arica. The government also schedules civic ceremonies, wreath-laying at memorials, and regional cultural festivities. It serves as a grand tribute to the fallen heroes and an opportunity to educate the younger generation about the nation's rich history.

The Battle of Arica is not only a recall of the historic event, but it also aims to instill pride and honor among the Peruvian people. School curriculum includes the learning of this monumental battle, and public institutions pay homage to the bravery of the soldiers involved. Many citizens use the day to reflect on the values of freedom, courage, and unity that the Battle represents, making it an essential part of the national identity of Peru.