The Marching Spartans are the largest ensemble in the band program. The Marching Spartans perform at all home football games, most away football games, several competitions, and local parades. Membership is open to all students at Giles High School, who have successfully completed middle school band. Color Guard membership is open to all Giles students, pending audition. 

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The Marching Spartans rehearse for two weeks during the month of August for Band Camp. After school rehearsals are on Tuesdays, Wednesday, and Thursdays from 3:30 pm to  5:15 pm during the football season. Please see the calendar for more information.