Great Hall | Museum Of Military Glory GoW: Judgment Guide
Last update: 11 May 2016
After the cut-scene you'll see two sentinels in front of you. Put them on the left and the right side, somewhere in the middle of the stairs. There are many ammo crates scattered all around, as well as grenades - pick them up (you can use them on walls as mines). Your time is limited, so hurry with preparations before the attack begins.
There is a symbol of declassified mission on the wall. If you activate it, you'll have to face also Nemacysts, which explode when get close to you. You can try to shoot them down before they come closer or jump aside just before explosion.
When the attack begins, I recommend focusing on defending the right wing, which is attacked with by more enemies. Keep monitoring sentinels because they might run out of ammo (a proper symbol appears over them - you have to go there and replenish sentinel's ammo). After repelling the first wave you'll have some time to replenish your ammo. The next attack will be even stronger. Prepare for a large group of Boomers coming from the left side. Stay on the instant move, avoiding/destroying Nemacysts. Pay also attention if any of opponents drops Gatling gun, which can be very helpful in repelling the attack.
After defeating the second wave you'll be able to go to the next area. But before you do this, jump over the small wall surrounding the statue in the lower part of the hall. In front of the statue you'll find another COG tag.