California Campaign was mostly a series of small conflicts between militia, U. S. troops and their Mexican counterparts. It resulted in a small number of casualties. By most warfare standards the California Campaign was almost “bloodless”. An informal agreement, commonly called “The Treaty of Cahuenga” ended the fighting on January 13, 1847. It was signed in what is now North Hollywood, California between Mexican Governor Pico of California and General John C. Fremont.