I agree mostly with SlyEcho with a few other points I have found.
1) Be careful with forming doomstacks with your levies in low support provinces. I once watched attrition bring a 50k Shiba doomstack to 35k over several months as it ran its merry way through Uesugi territory. Your retinue can counter attrition through reinforcements. Your levies cannot.
2) Once you get to a medium size (15 or more provinces), you can start doing a levy rotation to keep in a state of constant war/growth. Provinces that are at max levy are not generating more troops for the war effort unless they are being used as guards for border provinces.
3) If you are planning to go up against someone larger than yourself and cannot get allies but have plenty of cash, bring up a large amount of levies and allow the provinces to replenish while they are up. It will give you the extra troops that might make the difference of the war if you immediately need a second wave.
4) Do not be afraid to disband levies, but if at all possible, do it in friendly territory. If a levy has lost even half of its members but disbanding it will not result in any men being lost, go ahead and do it and bring them back up.
1) Be careful with forming doomstacks with your levies in low support provinces. I once watched attrition bring a 50k Shiba doomstack to 35k over several months as it ran its merry way through Uesugi territory. Your retinue can counter attrition through reinforcements. Your levies cannot.
2) Once you get to a medium size (15 or more provinces), you can start doing a levy rotation to keep in a state of constant war/growth. Provinces that are at max levy are not generating more troops for the war effort unless they are being used as guards for border provinces.
3) If you are planning to go up against someone larger than yourself and cannot get allies but have plenty of cash, bring up a large amount of levies and allow the provinces to replenish while they are up. It will give you the extra troops that might make the difference of the war if you immediately need a second wave.
4) Do not be afraid to disband levies, but if at all possible, do it in friendly territory. If a levy has lost even half of its members but disbanding it will not result in any men being lost, go ahead and do it and bring them back up.