I don't have my old notes readily availabe but
2nd Ranger Batt stationed at Ft Lewis, Washington, did lots of Paintball training. ( I know because I was involved in a few of the sessions as the OFOR.)
Both sides were given different color paintballs so that during the AAR it could be determined who was 'killed' with friendly fire or enemy fire.
The first mission there were lots of friendly fire on the Ranger's side. It was determined (Decided by the officers) that maybe the Rangers were not taking the training as a real exercise because it was paintball.
The second mission there were still high levels of friendly fire on the Ranger's side.
Command was now not happy (pissed is more like it.)
They stopped the training that day and went home (for briefings?)
They came back for the second day of training and did some what better.
One month later after some serious in house training, they came back for another 3 day training execise.
First they played a bit of speed ball (tight quarters, close range, very fast play) in the morning. Then they did the actual missions using paintball.
Very, very few friendly fire kills.
Many of the Rangers, had a better mindset about the training missions and fire control (targets, controled shots, observing fields of fire. OFOR had unlimited ammo, the Rangers had limited ammo.)
Also, I was involved with some Training with the SP (AirForce military police) at Offutt Airforce Base in Nebraska. The commanding officer wanted to build a better team work within his command and let the airmen have some fun too. Later he decided to spend some money on the M16 and military like pistols that shoot paintball and do actual 'life' training.
They did training on the installation and at the paintball field.
IMO, this was great, and I personally have no desire to go against Airforce SP, in any attempt to penetrate an Air Base.
As for the WW2 training, I cant remember what documents, (and I know that they are in public records because I researched them at public library) but some of the results showed that the Marines seemed to react better at being fired upon than the Army.
During Vietnam, it was again determined that the Marines reacted much better while under fire than the Army.
One of the main reasons was how the Marines did their range (shooting targets) than the Army did.
The Army used knock down, automatic flip up (reset) targets, where the Marines stationed men down range under the targets (behind berms) and they manually reset the targets.
It was determined that being shot at, hearing the rounds 'fly overhead' and/or hit the berm/targets, helped condition the Marines to 'being underfire' yet still doing their job.
(this only applied to those soliders (Army and Marine) that had recently been in country. If memory serves correctly, a foot note about how most all soldiers reacted the same after being 'in country' for 30+ days. Also that the soldiers in the field had different reactions under fire than those stationed at bases. )
I will do some digging in my boxes of military this month and see if I can find my notes or any tech manuals on this. Sorry, I don't have them right handy. Its been more than a decade since I did that research.
As for MILES (military laser tag) it is helpful only if the service members and the controls keep things real and do not cheat or let the soliders cheat.
Dave Chase