Original sentence: Even though, because of his paralyzed leg, he had trouble moving about, he would always march at the head of his unit, using his SWT-40 carbine as a crutch (even though the unit possessed several wagons for transport)
Edited sentence: Even though he had trouble moving about due of his paralyzed leg, he would always march at the head of his unit, using his SWT-40 carbine as a crutch (even though the unit possessed several wagons for transport)