The vast majority of army issued 1911A1s were made 1943 to 1945. There were none brought back from the Pacific, Europe, Korea or VN. The ones issued to troops in the pacific were buried at sea, the ones the army took to the ETO were put into depots, given to our gallant allies and destroyed after the maintenance became too burdensom. The ones taken to Korea were given to the ROKS and the ones taken to VN are now in warehouses in now communist viet nam. No weapons were brought back to CONUS after a conflict until Desert Storm.
The wear and tear on surviving issued 1911s came from excessive stripping and cleaning. I had one assigned to me for almost two years in Germany. Every week, I drew it from the arms room, stripped it, cleaned and returned it to the armorer for inspection and return to the rack. During that time I got to shoot it once. 50 rounds at a round target at 25 years, strong hand holding the gun, weak side hand inserted into the left trouser pocket. This was the only acceptable way of shooting a handgun in the Army. The targets were burned and everyone later received an 'expert' qualification badge to make the commander look good for having trained so many superb marksman.
The one that I had in VN was a Colt 1911A1. It took half an hour daily to scrub the nightly accumulation of rust off it. Then it went into a plastic bag and was inserted into the wet issue leather holster. Carry mode was empty chamber with the hammer down. Any other carry mode would get you in big trouble. If you needed a weapon in a hurry, this was not it. By the time you lifted the flap, withdrew the weapon, took it out of the plastic bad, racked the slide to chamber a round and aim at your source of trouble, the trouble was gone or you were a statistic. Mercifully, our battalion commmander gave us the option of turning them in, which we were glad to do.
With the exception of a few guns assigned to Advance indivitual training units, I doubt that any 1911 ever fired a thousand rounds.
I would be the first to defend the 1911 platform as the basis for a superb firearm. I have a safe full of them and delight in firing, fondling and admiring them. However, the army and marines did not have Wilsons, Baers, or Kimbers. What they were issued was worn out crap. Crap with no finish remaining, terrible sights, terrible triggers and loose sloppy fit. As an aside, something for you to think about, at this point in history these guns were the same age as most of the Berettas in the hands of our troops now.
The golden age of the 1911 started with Jeff Cooper preaching about them and Kimber finally delivering a usable product with all the features that made a decent .45, at a reasonable price. You don't like Kimber? Well, if you don't like their guns, give them credit for making colt and springfield ship guns with decent sights, triggers, and controls that made them user friendly and accurate.
I adore and dote on my Les Baer and STIs, but have no more fond memories of GI issued 1911s than I do of C Ration toilet paper or sleeping in the snow.