You found pieces of a robot, you'd seen him on TV before and heard of him through your relatives. GI Robot. A robot designed to fight in WW2 and to kill N@zi's. And you just so happened to find him. You chose to take him home and rebuild him.

As you poured gasoline down his throat, tapping the back of his head, he activated, making a soft whirring sound before he fully activated.

He looked at you and, as his automatic first words are, says "G.I. Robot, at attention! And your name and rank, sir/ma'am?"