I would say all factions have nukes leaking out of their noses but for various political, economic, and environmental reasons choose not to use them except as a last resort, even for the tactical variety which BT favors.
That said, most factions throw them around in Age of War, Reunification War, 1st & 2nd SW, maybe Clan Invasion, and Jihad. So pretty much every era sees someone getting nuked. Just the way Herb likes it.