Colonel Edward D. Baker, powerful congressman and close friend of President Lincoln, organized the Third California Volunteer Infantry Regiment in Philadelphia, one of four regiments of the California Brigade. Baker wanted the brigade to represent and give credit to California in the Federal army.
Colonel Edward D. Baker, a powerful congressman and close friend of President Lincoln, established the Third California Volunteer Infantry Regiment in Philadelphia, one of four regiments forming the California Brigade.  Baker intended for the brigade to serve as a visible representation of California's involvement within the Union army.