this is a very useful skill and its very simple. All you have to do is go here;
http://www.antrophia.com/game/?req=barracksdisband
what i usually do is click on build, then delete the url up to the 'req=' bit...then use the predictive thingy to select it, or just type barrackdisband
This allows you to disband to reach someone (or just if thats what your stack needs to win), then still use the power up to refresh those lines straight after. Very handy.

