So taking them apart didn't work, but for some reason removing the first part and then just moving the other parts, still interlocked, around solved the level. That doesn't seem right.
"Hire 20 peasants. Easy" Oh, fk you. I can't even hire 5 peasants at a single time because they all get killed by a single swordfighter because apparently my own swordfighters are completely useless. ON FKING VERY EASY