Complex sentence: For similar reasons, as the United States Navy deployed Polaris submarines during that decade it shifted aircraft carriers away from delivering strategic nuclear weapons to a role suited for both general nuclear and limited non-nuclear wars.
Split into simpler sentences: For similar reasons, as the United States Navy deployed Polaris submarines during that decade. At that time, it shifted aircraft carriers away from delivering strategic nuclear weapons to a role suited for both general nuclear and limited non-nuclear wars.