Drum Corps International Corps- World & Open & the Regions with the most corps/membership

1. World Class

1.1. California Corps

1.1.1. Blue Devils A

1.1.1.1. Mandarins

1.1.1.1.1. Santa Clara Vanguard

1.2. Team Texas

1.2.1. Genesis

1.2.1.1. Crossmen

1.3. Midwest

1.3.1. Phantom Regiment

1.3.1.1. Madison Scouts

1.3.1.1.1. The Troopers

2. Open Class

2.1. California Corps

2.1.1. Blue Devils B

2.1.1.1. Santa Clara Vanguard Cadets

2.1.1.1.1. Incognito

2.2. Team Texas

2.2.1. Guardians

2.3. Midwest

2.3.1. The Colt Cadets

2.3.1.1. Shadow

2.3.1.1.1. River City Rhythm

3. Similarities

3.1. Both World & Open class corps are affiliated with Drum Corps International (commonly referred to as simply DCI).

3.1.1. Both World & Open class corps memberships are made up of students from withing the state; out of state; and even internationally.

3.1.1.1. Both World & Open class corps members have a Finals showdown the second week of August, in their corresponding cities.