That's a pretty rich history. I don't have that sort of lineage. My Grandfather tried to enlist for WWII but was denied for a blood condition and flat feet. In more recent times I have three Uncles who served, my Dad was a reservist for a short time, my Brother is currently serving, my Sister-in-law is currently serving and my Husband is currently serving.
I bet the stories your grandfather and great uncles could have told would have been fascinating.