At the risk of being killed for being pedantic, Bismarck was sunk 27th May '41 whereas Barbarossa began 22nd June '41, so you're a bi out of synch with your timing.
Having said that (I'm just teasing), it's a fun read, especially when my partner is a real-life "Heidi". Her mother is German and escaped Eastern Germany soon after WWII as a very young girl.....
