Question: What event has a feature that has been described as "the first major military campaign fought entirely by air forces"?
Context: The Soviet Air Forces (Russian: Военно-воздушные силы , "Voyenno-Vozdushnye Sily" (VVS), literally "Military Air Forces") was the official designation of one of the air forces of the Soviet Union.  The other was the Soviet Air Defence Forces.  The Air Forces were formed from components of the Imperial Russian Air Service in 1917, and faced their greatest test during World War II.  The groups were also involved in the Korean War, and dissolved along with the Soviet Union itself in 1991–92.  Former Soviet Air Forces' assets were subsequently divided into several air forces of former Soviet republics, including the new Russian Air Force.  "March of the Pilots" was its anthem. The Guadalcanal Campaign, also known as the Battle of Guadalcanal and codenamed Operation Watchtower was a military campaign fought between 7 August 1942 and 9 February 1943 on and around the island of Guadalcanal in the Pacific theater of World War II.  It was the first major offensive by Allied forces against the Empire of Japan. The North-Western Area Campaign was an air campaign fought between the Allied and Japanese air forces over northern Australia and the Netherlands East Indies (NEI) between 1942 and 1945.  The campaign began with the Japanese bombing of Darwin on 19 February 1942 and continued until the end of the war. The Battle of Mosul (2016–17) (Arabic: معركة الموصل‎ ‎ , "Ma‘rakat al-Mawṣil"; Central Kurdish: شەڕی مووسڵ‎ , "Şeriy Mûsil") was a major military campaign launched by the Iraqi Government forces with allied militias, the Kurdistan Regional Government, and international forces to retake the city of Mosul from the Islamic State of Iraq and the Levant (ISIL), which had seized the city in June 2014.  During the military intervention against ISIL, Iraqi and Peshmerga forces had already made unsuccessful attempts to retake the city in 2015 and again in 2016, despite limited gains. The Battle of Mobei () was a military campaign fought in the northern part of the Gobi Desert.  It was part of a major strategic offensive launched by the Han Dynasty in January, 119 BC, into the heartland of the nomadic Xiongnu.  The battle was a success for the Han, whose forces were led by Wei Qing and Huo Qubing. The Bombing of Singapore (1944–45) was a military campaign conducted by the Allied air forces during World War II.  United States Army Air Forces (USAAF) long-range bomber units conducted 11 air raids on Japanese-occupied Singapore between November 1944 and March 1945.  Most of these raids targeted the island's naval base and dockyard facilities, and minelaying missions were conducted in nearby waters.  After the American bombers were redeployed, the British Royal Air Force assumed responsibility for minelaying operations near Singapore and these continued until 24 May 1945. The Battle of Britain (German: "Luftschlacht um England" , literally "the air battle for England") was a military campaign of the Second World War, in which the Royal Air Force (RAF) defended the United Kingdom (UK) against large-scale attacks by the German Air Force (Luftwaffe).  It has been described as the first major military campaign fought entirely by air forces. Airbourne, also known as Eastbourne International Airshow, is a 4-day international air show run every August in Eastbourne, East Sussex, England.  The event features Battle of Britain memorial flights and aircraft from the RAF and USAF, among others, and enjoys a long relationship with the Red Arrows display team. The Defence of the Reich (German: "Reichsverteidigung" ) is the name given to the strategic defensive aerial campaign fought by the "Luftwaffe" over German-occupied Europe and Nazi Germany during World War II.  Its aim was to prevent the destruction of German civilians, military and civil industries by the Western Allies.  The day and night air battles over Germany during the war involved thousands of aircraft, units and aerial engagements to counter the Allied strategic bombing campaign.  The campaign was one of the longest in the history of aerial warfare and with the Battle of the Atlantic and the Allied Blockade of Germany was the longest of the war.  The "Luftwaffe" fighter force defended the airspace of German-occupied territory against attack, first by RAF Bomber Command and then against the United States Army Air Forces (USAAF). The Conquest of Khorasan by Safavid loyalist forces against separatists in Khorasan was Nader's first major military campaign which he waged on behalf of the new Safavid pretender to the throne, Tahmasp II.  It would propel him into the centre of the political landscape of war torn early eighteenth century Persia.
Answer: Airbourne