Complex sentence: Fetterman's infantry took up a position among some large rocks and, in hand-to-hand fighting, he and 49 men perished, their bodies facing outwards in a small circle, huddled together for defense.
Split into simpler sentences: Fetterman's infantry took up a position among some large rocks and in hand-to-hand fighting, he and 49 of his men died. Their bodies were found outwards in a small circle, huddled together for defense.