In 1859, Douglas also found his colony embroiled in a dispute with Washington Territory over sovereignty in the San Juan Islands. The protracted, twelve-year standoff came to be known as the Pig War. Douglas pressed Britain to exert sovereignty over all islands in the archipelago dividing the Strait of Georgia from Puget Sound. Named for the largest island of the group, the San Juan Islands are immediately adjacent to Victoria and so were of great strategic interest and worry. While opposing troops remained garrisoned on San Juan Island, the dispute was eventually settled by arbitration in favour of the United States.