The Acto de Chacarillas was a ritualized youth event held in the summit of in Santiago, Chile on July 9 of 1977 organised by the military dictatorship of Chile. It was organised by the to commemorate its second anniversary and a new anniversary of the Battle of La Concepción. Seventy seven young men and women were invited to the act, the number being chosen to represent the 77 Chilean soldiers that died in the Battle of La Concepción in 1882. Andrés Chadwick, Hans Gildemeister, Cristián Larroulet, Joaquín Lavín and Antonio Vodanovic were among the invitees.