In original history the Wright Brothers first powered flight was with a bi plane that had the propeller at the front and it was in 1906.
ERA tank armour was not in use until the 2000's, now it was on Soviet tanks in the 1980's.
The German ME262 jet fighter never got off the drawing board during WW2, only prototype engines were made.
Various passages in the Bible (which I have been reading for 30 years) have changed. Extra chapter have been added and the verses on the church walls no longer match those in the book of the same version.
If anyone can put me back onto the original timeline I'm all ears, but I know they can't.