I am baffled by this problem. I want to make a turn-based tactics game, but I am having trouble making a trigger that lets only 1 unit move and attack per turn. Any advice would be great. Thanks.
Learn some basic triggering before jumping into this hard stuff.
It takes a lot of time and patience to make a Turn-Based Battling System.
I know some basic triggers. I may not be the best, but I enjoy triggers.
"Some basic triggers" won't help you one bit. Turn-based stuff in Starcraft all take experience and patience. I'll assume you have the latter, but you still need more practice. Draw yourself a visual aid to help you identify the goals you want to achieve in triggering: how do you define turns in SC? How do you perform actions in these turns? What determines one turn's start and another's end? Etc.