Complex sentence: When World War II began, Fort Lauderdale became a major US base, with a Naval Air Station to train pilots, radar operators, and fire control operators, and a Coast Guard base at Port Everglades was also established.
Split into simpler sentences: When World War II began, Fort Lauderdale became a major US base, with a Naval Air Station to train pilots, radar operators, and fire control operators. A Coast Guard base at Port Everglades was also established.