Jfk wasn’t assassinated, his head just did that

The ones where all the burnt texts such as the Mayan codices and Manichaean scriptures are found stashed away somewhere and we get to see what everyone was actually afraid of.

The Southern Victory series by Harry Turtledove. Follows from the South winning the Civil War up through WWII with the US and Confederates being bitter rivals throughout.

Temeraire

The setting is the Napoleonic Wars but with dragons as air support.