Complex sentence: Calling first at San Diego, she took on board 517 National Naval Volunteers and apprentice seamen to bring her war complement to 823 officers and men; and, on 20 April, she was placed in full commission.
Split into simpler sentences: Calling first at San Diego, she took on board 517 National Naval Volunteers and apprentice seamen to bring her war complement to 823 officers and men. On 20 April, she was placed in full commission.