Which aspect of Warhammer II is the most important for new players to learn?

[Alwyn]

Warhammer II is free to play this weekend, so this seems like a good time for a poll about this game. The options below came from this video for new players.

Which aspect of Warhammer II is the most important for new players to learn?

1. How to fight corruption spread by other factions
2. How to optimise provinces by selecting the best building chains
3. How to use ambush stance
4. How forced march stance works and why not to use it
5. How skirmish and guard mode work on the battlefield
6. How monsters can destroy gates
7. How to make full use of cavalry by charging repeatedly
8. How to draw a unique path for unit(s) on the battlefield
9. How to move units on the battlefield with locked formations or using Alt + click + drag
10. How to reduce enemy morale
11. Something else (please specify on the poll thread)

[Daruwind]

1) For obvious reason. Everthing else is related to one battle (bad tactics, formation....), or one turn (ambush), at max a few turns (buildings) but number one especially on higher difficulty need careful a longer care. I can compromise multiple provincies has potential issue to sink whole campaign...

[lolIsuck]

How to cheese siege battles. Most things in Warhammer are pretty straightforward, how to deal with what's probably the worst part of the game is important.