system
Given the following post, respond as if you're commenting on Reddit:
human
[MCU] How much differently did WWII play out?

Since Hydra rose to power in WWII and Red Skull had plans of conquering Germany as well as the rest of the world, how much different was WWII in the MCU? Did Hitler still die the same way? Did the US still drop 2 Atomic bombs on Japan?
gpt
Not too much changes.  Captain America, the 107th, and the Strategic Science Reserve were mostly aimed at forcing HYDRA on the defensive, which means they probably saw Hitler as a secondary threat and couldn't prioritize going after him.

The atomic bombs are still dropped, and Obadiah Stane mentions that Howard Stark helped create them.  Atom bombs means that the Cold War and nuclear arms race still happen.  Anton Vanko defects to the US and Stark Industries for a while, and Hank Pym and Janet Van Dyne take on SHIELD missions such as taking down a Soviet ICBM.  Also, the Cold War and subsequent conflicts are the reason Stark Industries grew so rich on weapons sales.