I still don't have any specific information regarding Charles Purcell, but I thought that you would want a little insight into his unit, 2nd Ranger Infantry Battalion.
It was activated 1 Apr 43 at Camp Forrest, TN, as 2nd. Ranger BN at Camp Patrick Henry VA; (later, 1 Aug 43, redesignated 2nd. Ranger Infantry Battalion);
departed NY P/E 23 Nov 43;
arrived England 29 Nov 43;
assaulted Omaha Beach, France 6-6-44 (D-Day) under Lt. Col. James Earl Rudder (who was later elevated to General, and after retirement, served as President of the Texas A & M University system a number of years);
after several distinguished actions, the Rangers were assigned to the 28th Infantry Division to participate in the infamous Battle of Huertgen Forest, which lasted something like 90 days;
the rangers attacked a vital point, Hill-400, on 6 Dec 44;
they captured Hill-400 7 Dec 44;
Hill-400 fell to the Germans again 8 Dec 44, where it remained until it fell again to the Ranger relief, an infantry Regiment and a Tank Destroyer unit.
The Rangers experienced a loss of approximately 90% during this operation.
If you would want to read an excellent text on the subject, you might pick up CITIZEN SOLDIERS, Stephen E. Ambrose, author, Simon & Schuster, NYNY, publisher.