In the film it's stated that Lewis is an SAS soldier and that Schoolboy is SBS, both are special forces from England. The movie however never states the military background of Reese, En-Joo, and Diaz, but here on the Wiki, it's says that Reese was an Army Ranger and Delta Force Soldier, En-Joo was a Navy Seal and that Diaz was a Green Beret.
Does anyone knows where where this information can be found? it was stated by Sly somewhere? The most I know is that En-Joo uses a Luminox Navy SEAL watch, Reese uses a M4A1 carbine with M203 grenade launcher, which is commonly used by the Delta Force and that Diaz has a knife that kinda looks like the ones used by Green Berets. But does any hardcore Rambo fans actually knows if they were confirmed to be in those Special Forces?