But your father, and his confreres, did love one another, and express their love in a physical way, which was most likely platonic - didn’t they?
(just trying to stick with the subject of the original post...)
They were Brothers in the sense of shared combat experience, shared hardships, and shared victories.
Highly doubtful that they EVER would have thought of it as “love”.
They formed lifelong friendships, helped each other out through rough times after the war as well.
Again, I don’t think they thought of it as “love” - just “Hey... these guys saved my life. I owe them.”
And if by “physical” you mean a handshake and a slap on the back, offering a cigar and shot of bourbon when they saw each other, yes.
Any other physical way, no, not so much. Not in my line of sight.