My army,well,isn't that well organized,if it could even be called organized
Basically, they are seperated into 6 categories
1.all of my ranged units;like crossbowmen and archers.
2.melee units on foot;swordsmen,axemen,pikemen,spearmen.
3.knights on foot;ummm.....knights on foot! I usually arm them with shiny swords,crown ovoid shields,KK1 shields and many,many feathers from Bricklink or the 20 plus i have lying around
some of them serve as captains for the melee units to make sure they arent running from the field or arent sliceing limbs fast enough
4.knights on horseback; I atleast give each of them a lance and classic sword,and then personally outfit them with plumes and different weapons like flintlock pistols,BF warhammers and crossbows to make each of them look different and unique. They are led by the "Golden Knight" from Drawbridge Defense.
5.Royalty; my royal bodyguard of 8 armed with pikes and the king with a yellow dragon plume and gold sword.
6.Musicians,standard bearers and armed rabble/civilians; the last category is basically anything that doesn't fit into the above categories but are still Castle orienated like my trumpeteers and standard bearers who lead and signal the troops in battle. Sometimes,also, I will arm my hundred plus civilians,most with classic peasent torsos in blue,green or gray, and charge them into battle with 3 pitchforks ,scythes, torches,and anything else I have lying around!
I also have many classic castle people,like forestman and wolfpack,but they just join the mob or stay on the table