The document discusses the evolution and increasing use of helicopters in warfare from World War II through modern times. It notes that helicopters saw limited early use but became more prominent in the Korean and Vietnam Wars, where the U.S. used them to rapidly deploy and extract troops. Helicopters also took on new roles like medical evacuations and gunship support. Their tactical value was further proven in conflicts like the Gulf War. While helicopters still have limitations compared to fixed-wing aircraft, ongoing innovations continue to broaden their military applications.