What was the problem with the American Paratroopers on D-Day?

Many of the American Paratroopers couldn´t be dropped on their target areas. Furthermore, they lost supplies and suffered numerous losses under German gunfire.  

Explanation:

The D-Day offensive began with an early attack by American paratroopers. However, the heavy fog made it difficult for them to reach their planned targets, leaving them in unknown and dangerous areas. German gunfire took many of their lives as soon as the attack began, and it also made them lose some of their supplies needed for the invasion.

1.the population change is near or at replacement level.

4. the birth and death rates are balanced.

6. sweden is most likely a developed country.

wait history, who want to talk about history, boring.