Complex sentence: In 1992, the Air Force reorganized its military unit structure; the Strategic Air Command (SAC) was deactivated on June 1, succeeded by the unified U.S. Strategic Command (USSTRATCOM).
Split into simpler sentences: In 1992, the Air Force reorganized its military unit structure. SAC was deactivated on June 1, succeeded by the unified U.S. Strategic Command (USSTRATCOM).