Department of the Pacific Department of the Pacific The Department of the Pacific or Pacific Department was a major command (Department) of the United States Army during the 19th century. The Department of the Pacific was created on October 31, 1853, at San Francisco, California, replacing the older Pacific Division, (1848-53) and abolishing the existing 10th (California) and 11th (Oregon) Departments, consolidating them within the new Department. The department reported directly to the headquarters of the Army in Washington, D.C.. It oversaw the military affairs in the country west of the Rocky Mountains (California, Oregon Territory, and Washington Territory), except for the Utah Territory
California Pacific Railroad the route of the California Northern Railroad between Vallejo and Suisun and can be seen along portions of State Route 12. The original Cal-P line ran to Vallejo, not along the present main line route through the Suisun Marsh between Suisun – Benicia – Martinez. The Southern Pacific line between Martinez and Sacramento (or perhaps Oakland and Sacramento) was informally known as the "Cal-P" after the original builder of the line, the California Pacific Railroad. California Pacific purchased the Napa Valley Rail Road at foreclosure on June 9, 1869. The Napa Valley Rail Road was built from the head of