Complex sentence: After the war, in 1949 she was moved to Mobile, Alabama and served as a US Coast Guard ship before later being moved to the James River in Virginia as part of the National Defense Reserve Fleet.
Split into simpler sentences: After the war, in 1949 she was transferred to Mobile, Alabama and served as a US Coast Guard ship. After completing her US Coast Guard work in she was moved to the James River in Virginia as part of the National Defense Reserve Fleet.