An airbase (sometimes referred to as a military airfield, military airport, air force station or air force base) is an aerodrome used by a military force for the operation of military aircraft.

An airbase typically has some facilities similar to a civilian airport - for example air traffic control and firefighting. Some military aerodromes have passenger facilities; for example RAF Brize Norton in England has a terminal used by passengers for the Royal Air Force's flights by TriStar to the Falkland Islands.

Many airbases are located remotely from populated areas.^{[citation needed]}

Some airbases have hardened aircraft shelters, or even underground hangars, to protect aircraft from enemy attack. Combat aircraft require storage of aircraft ordnance. An airbase may be defended by anti-aircraft weapons and force protection troops.

Road airbases are highways constructed to double as auxiliary airbases in the event of war. Nations known to utilise this strategy are Sweden [1], Finland, Germany, Singapore, Switzerland, Turkey and Poland. In the case of Finnish road airbases, the space needed for landing aircraft is reduced by means of an arrestor wire, similar to that used on some aircraft carriers.[2]

In baseball, a force is a situation when a baserunner is compelled (or forced) to vacate his time-of-pitch base—and thus try to advance to the next base—because the batter became a runner. A runner at first base is always forced to attempt to advance to second base when the batter becomes a runner. Runners at second or third base are forced only when all bases preceding their time-of-pitch base are occupied by other baserunners and the batter becomes a runner.

A forced runner's force base is the next base beyond his time-of-pitch base. Any attempt by fielders to put a forced runner out is called a force play. A forced runner is out (called a force out) when a fielder with the ball touches the runner's force base before the runner reaches that base. A forced runner also may be tagged out in the usual fashion as well; such a tag is still considered a force play if the tag is made before the runner reaches his force base. Any play on the batter-runner before he reaches first base is the same as a force play, though the rules do not include this in the definition of a force play.

Luke Air Force Base (IATA: LUF, ICAO: KLUF, FAA LID: LUF) is a United States Air Force base located seven miles (11 km) west of the central business district of Glendale, in Maricopa County, Arizona, United States. It is also about 15 miles (24 km) west of Phoenix, Arizona.

Luke AFB is a major training base of the Air Education and Training Command (AETC), training pilots in the F-16 Fighting Falcon. On 31 March 2011 it was announced that the F-35 Lightning II would replace the F-16 as the primary training aircraft at Luke, although the date of deployment of the new aircraft to Luke and reorganization plans were not announced.

Luke Air Force Base is the largest and only active-duty F-16 Fighting Falcon training base in the world with more than 200 F-16s assigned. The host command at Luke is the 56th Fighter Wing (56 FW), under Air Education and Training Command's 19th Air Force.

The 56th FW is composed of four groups, 27 squadrons, including six fighter squadrons. There are several tenant units on base, including the 944th Fighter Wing, assigned to 10th Air Force and the Air Force Reserve. More than 470 pilots graduate from Luke annually and proceed to combat assignments throughout the world. The 56th Fighter Wing also trains more than 700 maintenance technicians each year.