After leaving, the driver, unlike OTL, turns onto the Apple Quay in route to the hospital after the bomb had injured some. This change in plan means that Gavrilo Princip is not in the right place to shoot and kill Franz Ferdinand. This one turn will change the world forever
OTL vs ATL
The Great War doesn't happen until the 20's
The Russian Revolution never takes place, and the USSR never exists.
Hitler never comes to power
The USA doesn't break its isolation
Einstein, as well as other scientists, don't have to escape Germany.