Complex sentence: In 2012, the band swept all categories at the Northwest Guilford marching band festival, and in 2013, the band took first place at the same festival and hosted the Winston-Salem/Forsyth County Schools Marching Band Jamboree.
Split into simpler sentences: In 2012, they swept all categories at the Northwest Guilford marching band festival. In 2013, the band took first place at the same festival and hosted the Winston-Salem/Forsyth County Schools Marching Band Jamboree.