Head to a settlement and rest till the army looks in good shape again. If you travel, camp around in the jungle and war constantly, you will risk a loss. So patience is the key in this aspect of the game. For more guides on Mount & Blade II Bannerlord, head over to our Mount & Blade section.Best way to this is to fight gang wars in their town, play mini game, do their buggy mini quest and support their clan on the kingdom ui. Supporting their clan in kingdom UI is a bit double edge sword due you also giving them your influence points. It will definitely make it harder for you to steal their fief. Drop your troops into your castle/settlement, undress your lady and then go with just the two of you. Send her to fight the looters. Repeat. Having the perk Preventive Medicine on her makes the repeat part much easier since she'll have 30% HP after each battle, no need to wait for her to heal up to 20%.
Have founded my own kingdom, been using the Kingdom Decision to give myself larger Towns while letting the other 2 Clan take the Scrappy Castles that remains. Now I convinced a third clan to join my ranks, but now when there is a Kingdom Decision, i'm not longer available as an option to give the Fiefs/Towns to
Srnj.