I remember watching a cartoon (series?) in the late 90s early 2000s about humans fighting a war in space. They had tanks and artillery and mostly wore armor. I believe they were fighting some kind of (insectile?) alien species.
I had always thought that was a Starship Troopers cartoon, however I recently learned that there were only two Starship Troopers animations. One anime from the 80s and one CGI from the 90s. That's the right time frame, but what I remember was a western 2D animation with fairly bright colors. Nothing like the Roughnecks: Starship Troopers Chronicles series and more fluid looking and brighter than the anime.