It's a movie about this army going into space and fighting on a planet where the aliens are giant bugs

Starship troopers I own that movie
Starship Troopers (1997) (http://www.imdb.com/title/tt0120201/)

Ans starship troopers 2 Starship Troopers 2: Hero of the Federation (2004) (V) (http://www.imdb.com/title/tt0367093/)

And 3 Starship Troopers 3: Marauder (2008) (http://www.imdb.com/title/tt0844760/)