Officer Edric:
If you are interested in the match, simply register for battle. When you are ready to start, have the leader of your party let me know.
After the party leader selects one of the following degrees of battle difficulty, entry will be granted:
2-3 for battle with Mounted Troop Chamberlains,
4-5 for battle with Mounted Troop Soldiers,
6-7 for Mounted Troop Warriors, and
8-9 for Mounted Troop Great Warriors.
These are only recommendations; choose whichever level you want. But you're responsible for the consequences of your selection...
Keep listening.