US Army troops and Greek forces joined up for a three-day exercise of mock battles to fight off invaders.

The two armies – NATO allies – ran a series of mock battles and attack exercises during the drill.

In one video footage of the event, Apache flying gunships are seen flying low over the landscape at high speed.

Elsewhere tank crews and mortar operators show off their firepower.

And infantry troops display their marksmanship on small arms shooting range.

Newsflash obtained the footage from Sgt. Malcolm Cohens-Ashley and the US Department of Defense quoted the Public Affairs office of the 2nd Brigade Combat Team, 101st Airborne Division, as saying: “Soldiers assigned to the 1st Battalion, 502nd Infantry Regiment, 2nd Brigade Combat Team, 101st Airborne Division (Air Assault), Charlie Company, 1st Battalion, 8th Infantry Regiment, 3rd Armored Brigade Combat Team, 4th Infantry Division, 2-501st General Support Aviation Battalion, 3-501st Attack Helicopter Battalion, Combat Aviation Brigade, 1st Armored Division and the Hellenic XXV Armored Brigade conduct DV Day Rehearsal as part of Exercise Olympic Co-Operation 22.”

The exercise was held from 18th to 20th October at the Petrochori Training Area, in Greece.

The statement added: “The United States’ commitment to defending NATO territory is ironclad and the United States will continue to bolster our posture to better defend our NATO Allies.”