Complex sentence: The ground forces are rerouted to converge on the crash site, but the Somali militia throws up roadblocks, causing LTC Danny McKnight's Humvee column to lose its way, while sustaining heavy casualties.
Split into simpler sentences: The ground forces are rerouted to converge on the crash site. The Somali militia throws up roadblocks, causing LTC Danny McKnight's Humvee column to lose its way, while sustaining heavy casualties.