This 1946 map, made by Aaron Bohrod, shows some of the foundational American events for nearly every state, packed into a single map. There's plenty to quibble with, since some states share key events with their neighbors (and some of the placements on the map aren't quite perfect). But it still shows the often amazing, occasionally traumatic, and always fascinating events that made America what it is today.
You can hover to zoom or see a larger version of the map here. Every region's historical events are identified below, along with a bit about their significance. Your state probably has a notable event — and it might be a memory worth sharing once again.