Here is the full list of all 17 Bannerman achievements.
Keep an eye out for your fellow man
Topple a greater foe
Unlock dodge ability
Survive the battle
Kill 20 enemies
Kill 100 enemies
Die 10 times
Die 50 times
Study all combat treatises
Ignore all combat treatises
Best a colossal enemy
Let 20 arrows fly
Deflect 20 projectiles
The cycle continues...
Break the chain...
Collect 30 points of armor
Knock out 20 enemies