Complex sentence: Following the withdrawal of the U.S. Army from the Southeast Asian Theater in 1973, camouflage clothing was no longer routinely issued in that arm though the 1st Battalion, 13th Infantry Regiment wore the ERDL leaf pattern as an experiment in the early 1970s in Baumholder, Germany.
Split into simpler sentences: Following the withdrawal of the U.S. Army from the Southeast Asian Theater in 1973, camouflage clothing was no longer routinely issued in that arm. Though the 1st Battalion, 13th Infantry Regiment wore the ERDL leaf pattern as an experiment in the early 1970s in Baumholder, Germany.