What happens when you strap a Canadian soldier to his American counterpart and tell them to charge in opposite directions?

The dirt, literally, flies. To the victor? National pride.

And to the loser, the soil.

That's exactly what happened this week at Camp Atterbury -- a joint military training centre in Indiana -- when the men from the 31 Canadian Brigade Group came across U.S. troops grunting it out with harnesses attached to their backs.

Intrepid Master Corporal John Celestino stepped up and challenged the hometown crowd. A hardy contender from the U.S. National Guard accepted the challenge. Then they got down to business. Way down.

Cue the harnesses. And let the grunts commence.

According to the video's description on YouTube, "this version of the game builds esprit de corps and really works the leg muscles.. just ask Master Corporal Celestino!"

So, who won this battle of inches?

Check the clip, shot by Captain Tristan Hatfield of the 31CBG, to find out!

Oh yeah, that's the U.S. on the right side of your screen. Canada's left.

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