 Not long after, however, it was determined by state officials that the increased probability of U.S. entry into World War II carried with it a heightened threat of invasion and the new force would need to be reorganized to defend the state's territory rather than simply fulfill civil assistance missions.Recruiting was suspended and the entirety of the force was organized into the State Guard Reserve, which was simply a roster of individual personnel.In June, soldiers of the State Guard Reserve began to be reconstituted into a formed force with the activation of the Fourth Washington Volunteer Infantry Regiment.