Complex sentence: Meanwhile, the United States, having entered the war, stations its U.S. Seventh Fleet off Ireland and begins bombing raids on the southwest coast of England, as well as supplying men and equipment to a resurgent partisan movement.
Split into simpler sentences: Meanwhile, the United States, having entered the war, stations its U.S. Seventh Fleet off Ireland. The Americans begin bombing raids on the southwest coast of England, as well as supplying men and equipment to a resurgent partisan movement.