Spanish naval units arrive off Callao, Peru and warn the port will be bombarded in four days time.
In the continuing hostilities between Spain and the Peruvian-Chilean alliance, Spanish naval units arrived off the Peruvian port of Callao and warned non-combattants that the city would be bombarded in four days time. This attack indeed took place on schedule. Attacking ships and defending Chilean batteries ashore exchanged fire with damage and casualties on both sides. (By John Osborne)
"Bombardment at Callao," Frank Leslie's Illustrated Newspaper, June 9, 1866, p. 180.