When I first encountered a Sentry force field, I expected to be able to attack and destroy it. However, they don't seem to be targetable. Is there anything I can do except wait for it to fade (assuming I can't just go around)?
I'm glad you asked.
Massive units can break force fields by walking over them!
Enjoy the power of the Ultralisk, the Colossus and the Thor!
edit: its worth noting that you could burrow under force field with Roaches or Infestors.