How do you unmerge units without disbanding a few? For e,g: i have 5 pikes, and I want to remove one pike to attach to the hero army, which is lacking one more unit. How do i do it? I am noobie, sorry :(

You can click on the bottom of the unit with the left mouse button and then you will see the brown bar (with the number on it for how far he can walk) getting darker. Now if you right click on that, it will become brighter and the rest darker. The number of troops you have selected are highlighted. You can deselect or select as many as you like. Sorry if this sounds very vague. I don't know how to explain it but it's very easy.

thank you i understood your instruction :) appreciate it. cheers!