system
Given the following post, respond as if you're commenting on Reddit:
human
[MCU] Considering how different yet similar the MCU is to our universe, which big events that happened in our's did not happend in their's?

For example - did 9/11 happen? Was Osama killed? Did Hitler still kill himself? Were the big protests around the world a thing?
gpt
Tony was selling the US weapons in Afghanistan, so 9/11, or some variation if 9/11, probably happened.

The major point of departure for MCU earth seems to be Tony Stark going public as Iron Man.

There are others, of course, including the Asgardians fucking around in Norway a few hundred years ago, but the impact seems to be limited. Even the differences in World War II had relatively little impact.