Complex sentence: RCT-5 was in Camp Ripper, Al Asad, under the command of I Marine Expeditionary Force (Fwd) and led by Colonel Patrick J. Malay until January 2009 when they were relieved in place by the 8th Marine Regiment (RCT-8).
Split into simpler sentences: RCT-5 was in Camp Ripper, Al Asad, under the command of I Marine Expeditionary Force (Fwd) and led by Colonel Patrick J. Malay. In January 2009, RCT-5 was relieved in place by the 8th Marine Regiment (RCT-8).