The XM1111 Mid-Range Munition (MRM) was a 120 mm precision guided munition developed for the Rheinmetall 120mm Gun (known as the "M256" in the US military) used by several Western tanks.
 It was also intended to fulfill a requirement for Future Combat Systems (canceled) for a long-range, Beyond Line of Sight tank munition.
World War II (often abbreviated to WWII or WW2), also known as the Second World War, was a global war that lasted from 1939 to 1945, although related conflicts began earlier.
 It involved the vast majority of the world's countries—including all of the great powers—eventually forming two opposing military alliances: the Allies and the Axis.
 It was the most widespread war in history, and directly involved more than 100 million people from over 30 countries.
 In a state of total war, the major participants threw their entire economic, industrial, and scientific capabilities behind the war effort, erasing the distinction between civilian and military resources.
GB-8 was a precision guided munition developed by the United States during World War II.
 It was one of the precursors of modern anti-ship missiles.
GB-4 was a precision guided munition developed by the United States during World War II.
 It was one of the precursors of modern anti-ship missiles.
K/YBS500 is a Chinese air-to-surface missile / precision guided weapon / glide bomb / cluster bomb / rocket / munition dispenser system, and it is developed by the 624th Factory of China North Industries Group Corporation.
 This weapon system was first publicized following its approval on March30, 2006 by Sun Qin (), Deputy Director of the National Defense Committee.
The XM395 Precision Guided Mortar Munition (PGMM) is a 120 mm guided mortar round developed by Alliant Techsystems.
"Kampfgeschwader" 100 (KG 100) was a Luftwaffe medium and heavy bomber wing of World War II, and the first military aviation unit to use an unpowered precision-guided munition in combat to sink a warship on 9 September 1943 with the destruction of the  , in the first successful use of the Fritz X armor-piercing, gravity PGM ordnance.
The Pike is a precision-guided munition (PGM) designed by Raytheon.
 It is a 40 mm guided munition that can be fired from the barrel of an Heckler & Koch M320 Grenade Launcher Module and Enhanced Grenade Launching Module (EGLM) like a standard 40mm grenade, but is powered by a rocket motor to propel it 2,000 m to give infantrymen extended-range precision capabilities unlike anything before in a hand-held weapon.
 The weapon uses a digital, semi-active laser seeker to guide itself to within 5 meters of the target; it can operate in a two-man shooter/spotter team or by the grenadier alone lazing after firing, as it can fly for 15 seconds before homing in.
 When fired, Pike has a small propellant to "kick" it 2.5 - out of the tube before the nearly smokeless motor ignites, and range is dependent on firing angle.
 The munition is effective against fixed and slow-moving mid-range targets, using a 6/10 lb blast fragmentation warhead with a 10-meter lethality radius.
 Raytheon developed the weapon for three years in collaboration with Nammo Talley, which developed the warhead and propulsion system.
 The Pike is intended to be more accurate with a longer range than rocket propelled grenades (RPGs) and standard grenades, while being far lighter and more cost-effective than current infantry guided weapons like the FGM-148 Javelin.
 Further improvements could include different fuses, multiple-round simultaneous programming and targeting with data-link capabilities, and platform integration onto small boats, vehicles, and small unmanned aerial vehicles (UAVs).
 Pike weighs 1.7 lb and is 16.8 in long, too long to fit in the breech of the M203 grenade launcher.
 At AUSA 2015, Raytheon revealed they had performed two successful test firings of the Pike.
The Tor missile system (Russian: "Тор" ; English: torus ) is an all-weather low to medium altitude, short-range surface-to-air missile system designed for engaging airplanes, helicopters, cruise missiles, precision guided munitions, unmanned aerial vehicles and short-range ballistic threats (Anti-Munitions).
 Originally developed by the Soviet Union under the GRAU designation 9K330, the system is commonly known by its NATO reporting name, SA-15 "Gauntlet".
 A navalized variant was developed under the name 3K95 "Kinzhal", also known as the SA-N-9 "Gauntlet".
 Tor was also the first air defence system in the world designed from the start to shoot down precision guided weapons like the AGM-86 ALCM day and night, in bad weather and jamming situation.
 Tor can detect targets while on the move.
 The vehicle must stop intermittently when firing, although trials are being conducted to eliminate this restriction.
The Extended Range Guided Munition was a precision guided rocket-assisted 5-inch (127 mm) Shell (projectile) development by Raytheon for the U.S. Navy.
 The program was cancelled in March 2008 after twelve years of development and over 600 million dollars in funding.
 The developmental round was designated EX 171.
 ERGM consisted of three major subsections; propulsion (rocket motor), warhead, and Guidance, Navigation and Control section.
 ERGM is fired from the 5 inch 62 Caliber Mark 45 gun Mod 4 at which point the fins deploy, rocket motor would ignite and lift the munition to at least 80,000 feet (24 km) when the canards would deploy and guide the ERGM to the target based on GPS guidance.
 It was to be used on Arleigh Burke class destroyers (hulls DDG-51 through 112).

Question: What was the first military aviation unit to use an unpowered precision guided munition in a war that involved more than 100 million people from over 30 countries?
Answer: Luftwaffe