Answer:
Presuming your talking about easy from the 101st airborne
Step-by-step explanation:
The biggest problems were they were untrustworthy. After the jump at Normandy, they would trust there brothers that jumped with them. The replacements have most likely never jumped into a combat situation, or has ever seen combat before. The origial men of easy, or what was left of them have never seen them in combat, so they didint know how they would act under heavy fire, and because they were 99% of the time surrounded, they were always under constant heavy fire. They didint like the replacements either because they never trained with them, and some would even lie. I personally would seguest watching a show called "Band of Brothers", its the story about Easy company from the 101st airborne divison, 506th paratrooper regerment.