I don’t know how it work but last night we were attacking the spire and some how we captured the armory even though we did not capture the spire yet and this happened twice. 10 minutes ago I was on the defending side and we lost the armory before we even lost the spire.
It’s an bug that’s being exploited quickly.
You basically glitch the Marines inside the armoury into shooting the shields that lock you out. They die, you climb onto the roof and capture it. The game will see that you’ve “captured” the Armoury and then spawn the defenders at the Core. Really stupid. 343i is aware and are working to fix it.