A former United States Marine by the name of 1st Sgt. James T. Hollingsworth passed away recently, and this compelling picture of his brother in arms, Master Sgt. William H. Cox, standing at Parade Rest has made viral rounds across the internet.

According to Greenville News, the two fought together in Vietnam–1st Sgt. Hollingsworth was a mechanic and both served as door gunners. Master Sgt. Cox was also an Ordnance Chief.

They saw plenty of combat in Vietnam. They flew numerous missions side by side, over some of the most volatile jungles in the world at the time. Bullets can cut through many parts of a helicopter with relative ease, so just because they were in a flying metal box doesn’t mean they were safe from incoming rounds, not to mention the exposure a door gunner can have to the outside world, and how much fire they often draw when they start laying down serious rounds.

At one point, the two of them were taking cover as the enemy was mortaring and firing rockets at their position. They promised one another that if they made it through, they would get in touch at least every New Years after that–and so they did. Years later, “Hollie” fell ill and knew his time was up. He called up his brother in arms and asked him to carry out another “rough mission”–to give his eulogy when he passed. But as they had so many times before, 1st Sgt. Cox stepped up and paid his friend the respect he deserved.