It was actually around 260 years ago, since it took place 230 years before the opening of the dark portal. Dwarves that were alive at that time still exist today, and a lot of the current dwarves have either parents or grandparents that lived during that time.
The reason why the Gurubashi even attacked Stormwind in the first place is because the humans started expanding into stranglethorn and Gurubashi territory, see the Kurzen camps and buildings.
Another good one is Dun Morogh, and how the dwarves took it by force a long time ago, but the frost trolls endured in obscure locations, only being a small menance to the dwarven kingdom.
We straight up have quests that tell us to go and kill frostmane children to teach the trolls a lesson for them acting up in the dwarf starting zone. I love that one