In the opening battle in Africa, the Ranger lieutenant calls for air-support and two American pilots respond. They're flying Russian-made MiG-35 Fulcrum F fighters. American pilots flying Russian aircraft in Africa! When the pilots conduct their run, they turn into Su-25 Frogfoot close-air-support, and then back to MiG-35s when they depart. Neither versions of aircraft have external ordnance visible.
'Three years' after the opening battle, the American General comes to the lieutenant to ask him to come back for one more mission. The uniform the General is wearing is nowhere near American made. It's wearing Russian or Bulgarian buttons, rank, and insignia.
In the opening firefight, there's a brief 1-2 second clip of footage of explosions and soldiers being thrown around. That was taken from Rambo (2008) during that film's final battle when the rebels were dropping mortars on the Burmese soldiers, their uniforms are still visible.