Complex sentence: In June, she was a member of Rear Admiral Halifax's Force who was Senior Officer Red Sea Force tasked in the capturing of the port of Asseb, his Fleet consisted of a transport ship, an armed merchant cruiser, and two Indian sloops.
Split into simpler sentences: In June, she was a member of Rear Admiral Halifax's force. Halifax was Senior Officer Red Sea Force, tasked to captur the port of Asseb, and his fleet consisted of a transport ship, an armed merchant cruiser, and two Indian sloops.