This is an app?
I’d encourage the designer to at least give the user an option to jump to the different years, or type in a famous event to go there directly— like D-Day Landing, Battle of the Bulge, or Pearl Harbor attack.
I’m not sure I’d call this an app, but if turned into more of a book format in the apple book store with an added search feature, it would be a valuable resource. I’d call it a work in progress with great potential.
You might also consider giving references as to where your information has come from. To truly be useful, it needs primary source references.
Respectfully, just my thoughts. Best of luck!





