There was a great Rebel planet in one of my Hotseat games.
One of the Norak's planets rebelled, so my brother sent a surrender demand, plus his fleet of 15 Shiny new high tech Baseships to secure the territory.
The rebels refused to surrender, and instead, vaporized his entire fleet before they could even fire back
Later, I attacked that same colony with 250 ships. The survivors of that battle included One (1) Battlemoon (10,000kt), 8 assorted minesweepers and other "don't get hurt" support craft, and 20,000 troops (out of 50,000 originally) who managed to capture the planet after a year of ground combat.