Use the function keys (F1, F2, etc.) to position your troops. A "Shield Wall" of infantry with archers on a hill behind them is a classic, effective tactic.
Eventually, you can break away or fulfill the main quest to start your own kingdom. This requires high Charm and Right to Rule to convince other lords to join you. 5. Combat and Siege Tactics Mount.&.Blade.II.Bannerlord.v1.0.0.3624-OFME.to...
Join a kingdom as a mercenary to earn gold for every enemy you defeat without the long-term commitment of being a vassal. Use the function keys (F1, F2, etc