This is the entry from Casper, WY and were one of my favorites of the evening.
I really liked their uniforms.
This is the drum line of the corps from Iowa. I thought they had one of the best performances of the night.
There are some sharp uniforms and polished instruments.
There are some tense moments and serious competition. All in all, it was an enjoyable evening. These corps teams tour the country during the summer, competing against one another. It all comes to an end in August when they have a national final competition. If you hear of such an event in your area, I would encourage you to check it out. I think you will enjoy it.
Now there is always an inspiration for these types of groups. Some that inspiration comes from military precision drill teams. Another source are the true Drum Corps, like the Top Secret Regiment from Switzerland. Take a look at this.