Complex sentence: The Thurston High School Marching Band (affectionately nicknamed T.H.U.M.B.) is one of Thurston's most visible and successful bands, performing multiple times in the fall at all home football games as well as traveling to competitions throughout the Northwest.
Split into simpler sentences: The Thurston High School Marching Band (nicknamed T.H.U.M.B.) is one of Thurston's most visible and successful bands. It performs several times in autumn at all home football games, and also travels to competitions throughout the Northwest.