In terms of math: (on average)
1 event character with 2500 hp with a weapon that does 75 damage.
An entire ship, average 78 players. Take one battalion that is organized and together with 250 hp each (let's say 6 players) that's 1500 hp combined will all of them doing an average of 30-50 damage each.
Now, that's only one battalion, take another 3 and that's 4 x 1500 combined hp (4500) while all are doing individual damage - that isn't even half the server yet. Furthermore, let's add the Inquisitors that have 1000+ hp each with lightsabers that deal 100+ damage (including some lore characters that deal way more). Finally, all players can respawn and continue the battle, event characters only have 1 life.
With the right organization, it should be easy.