John Matrix is a retired Delta Force soldier and the main protagonist of the 1985 action cult classic movie/film, Commando. Matrix is a devout, loving father, which is why he retired from the military but is willing to do whatever it takes to protect the ones he loves, namely his beloved daughter, Jenny.
John Matrix was born in East Germany. At some point, Matrix came to the United States and joined the military, joining an elite and secret Delta Force squad. He left to raise his daughter.