Just saying to the person who says the Americans were the only ones with troubles, that is completely false. The Canadians on Juno Beach took a higher casualty rate, Omaha is just most famous because it was larger. Also, one German couldn't have killed 2,000 on Omaha because the TOTAL dead on both Utah and Omaha was around 2,500 so saying one man on Omaha accounted for the majority of these is a complete fallacy.
Just go for speed and strength in the beginning and then as soon as you get to the stages with red blood cells get reproduction (because you can't get much of it early on). Defense is kinda useless because you always get overwhelmed, it's better to just keep attacking
Great game... Could be more challenging though, plus every round turns out the same, being dominated by cannons and having your infantry not really making much of a difference 5/5 for the historical background though