June 5, 1972The first international environmental conference is held in Stockholm, Sweden. With the theme There is Only One Earth, the conference is attended by 1,300 delegations from 113 countries.

June 6, 1809Sweden declares independence and a constitutional monarchy is established.

June 7, 1879Peru, Chile, and Bolivia are involved in a five-year war. It starts with Bolivia, supported by Peru, which declares war against Chile. However, Chiles Na