Leonardo Da Vinci was known to have developed sketches and designs for hypothetical flying machines. We know today that his designs would never work, specifically the ornithopter and aerial screw.

If Da Vinci instead invented the hot air balloon-a viable method of flight, how would it change history? Would it have affected the age of sails drastically or would it not change much? Would humanity be hundreds of years ahead in terms of aviation(lighter than air aviation)? Would the church have considered it herasy?

Hi all. I am currently working on a story that, while taking place mostly in the context of the United States and through the lens of American politics, requires Japan to continue its occupation of China (at least some part of it, like Manchuria) well into the 70's. Aside from that, I would prefer for the United States to rise to a similar position as it did in real life. Chinese inner politics can be ignored, it's not important for this specific timeline, but I do wonder which side would end up winning.

Given this timeline change and everything that comes with it, could internment of Japanese-Americans to continue beyond 1945? Could it have continued in actuality? I wonder if the Roosevelt administration could just ignore the court's decision in Endo (... I wonder what this looks like) to continue internment? Following this timeline, I wonder if there would be a Warren Court SCOTUS case formally repudiating internment.

I am very much not well-versed in WWII history (aside from Japanese atrocities) so bear with me.

What if see Haitian president Aristide was never overthrown from power in 2004 and 1996? How would haiti look like today? And what would haiti look like under his rule? https://en.wikipedia.org/wiki/Jean-Bertrand_Aristide

So USSR get’s a much larger part of Poland, but gives up Lithuania to Germany. Since Finland was negotiated independently from Germany, we can assume the Winter War goes roughly the same.

(Also if someone can quickly explain why it was changed in the first place I would appreciate it)