The McDonnell Douglas A-4 Skyhawk is a lightweight attack aircraft designed in the 1950s. It was primarily used by the United States Navy and Marine Corps for close air support and ground attack missions. Known for its agility and small size, the A-4 could operate from aircraft carriers and land bases, making it versatile in various combat situations. The A-4 Skyhawk saw extensive service during the Vietnam War and was favored for its simplicity and effectiveness. Over 2,900 units were produced, and it has been used by several other countries, showcasing its enduring design and operational capabilities.