Nazull

I like to use Rapid Reinforcement for my troop units. But I had a chat with someone and they were saying we can use anything on this like ATST or Saber Tanks. I said it has the word troopers in it but he was saying that just telling us what units cant be used (Commander and operatives types) Where as I thought it was for only Trooper unit type only. Can anyone confirm if card is just for Troopers unit type only please.