Castrum Novum - battle strategies and wins

[Alerith]

Thanks for the reply.

I just promoted to Sergeant First Class and still can't seem to pick it up, so I'm thinking you do need Chief Sergeant rank.

Hmmm, I picked up the very first one as a Sergeant First Class, though I got a promotion almost immediately after.

Have you finished the main storyline? Gaius Van Baelsar acts like he's seen you before in the cutscenes, and the only time you encounter him in earnest is during the last main storyline mission.