Grand scale

This isn't about visiting many locations spread across the world/universe, but rather the events affecting things in extraordinarily large scale.

For example, World War may not actually be grand scale because, for example, the historical ones affected only quarter of the world if even that much, and the second one was actually multiple wars happening roughly around the same time.

Available methods of travel can be taken into account for measuring what is grand scale. For example you'd need to involve quarter of a galaxy or more in Star Trek to make it matter for this tag.