Michael Pena (Rodriquez) & Robert Redford (Professor Omalley) would both eventually play characters in the Marvel Cinematic Universe (MCU): Pena in the "Antman" franchise and Reford in "Captain America: Winter Soldier". Andrew Garfield also plays superhero character Spiderman who would eventually make it to the MCU but played by Tom Holland.
The trivia items below may give away important plot points.
The action, in which the two soldiers are lost, in Afghanistan is very similar to the Battle of Roberts Ridge, during which, a Devgru member named Neil Roberts fell from the ramp of a helicopter into the snow, resulting in desperate attempts to rescue him from circling Al Qaeda.
The battle depicting two army rangers on top of a mountain peak, is based off a real operation done by JSOC, in March 2002, and is now known as the battle on Takur Ghar. It involved Seal Team 6, Air Force special operations, and Army Rangers. Just like in the film, the mountain was deemed clear by intelligence specialists, however upon landing on the mountain the seals took heavy contact from entrenched taliban fighters. Neil Roberts, a navy seal, fell out of the ch-37 helicopter. He ended up in a very similar situation that the two army rangers end up in. However, none of Roberts' team mates jumped out after him. The second Army Ranger who jumps out is based on an Air Force combat controller, John Chapman, known as "chappie" who died assaulting an entrenched position. Like the rangers depicted in the film, Neil Roberts is killed by taliban backed forces. Army rangers involved in the battle of Takur Ghar, or "Roberts Ridge" we're the quick reaction Force for the SEAL team. At the end of the battle, 4 Army Rangers were killed, 1 combat controller technician was killed, 1 pararescuemen was killed, and 1 SEAL was killed.