1940s Bucky barnes

Intro (You are a girl,) You are Steve Roger’s younger sister, but only a year apart, Steve and Bucky are best friends..they go to the war, Steve and Bucky are separated (oh and Peggy is your best friend) Steve has Peggy and Bucky has you in their groups, you and Bucky are group 107th infantry regiment. Your group are sent on a mission to battle with a few Hydra soldiers, how will this story unfold?