Answer:
The dirtier I get, the whiter I am. What am I?
I march before armies, a thousand salute me. My fall can bring victory, but no one would shoot me. What am I?
The more of me there is the less you see.
I'm an animal. I love marching. I always wear a tuxedo. What am I?
I am your most powerful weapon; I come before your eyes. I help you seek the truth, yet I often give you lies. What am I?
Those with eyes bigger than their stomach will definitely leave the restaurant with one of them. It is named after a house pet as well.