From my matrilineal side its very blurry as my family is all over the world (irish spread like wildfire) , there were loads of people carrying my family name that participated in the Napoleonic Wars, ACW, WW1 and WW2.
From my paternal side its Frisians who built defensive works against the Vikings in the Middle Ages.
I am not aware of anyone on my dads side who fought in any big war since he has a very intellectual family, i heard a lot of stories about us being Free-thinkers, my great-great-grandfather is said to have been quite active in the field of nuclear science in the 19th century.
oh yeah, a nephew of my grandparents who was a Lieutenant in the Dutch-Indies Army got got captured and his head chopped off by the Japanese after he inflicted heavy losses on them when they airborne attack the airstrip at Manado.