Complex sentence: Reactivated in 1961 at Travis AFB, California as a C-135B Stratolifter strategic airlift squadron, it operated these aircraft over the Pacific and around the world transport routes under Military Air Transport Service.
Split into simpler sentences: Reactivated in 1961 at Travis AFB, California as a C-135B Stratolifter strategic airlift squadron. Operated C-135s over Pacific and around the world transport routes under Military Air Transport Service.