Different ways military tech changed our lives

Digital camera technology originally started life in early spy satellites where they were used to capture high-resolution aerial images of enemy installations. (image credit: NASA; Naval Intelligence Support Center, via Wikimedia Commons)
The Jeep was a multi-purpose and fully capable four-wheel-drive vehicle that was designed to be used in all theatres of combat during the second world war. (image credit: U.S. Army Signal Corps; Christopher Ziemnowicz, via Wikimedia Commons)
Historically, vehicle tyres were manufactured using natural rubber with suppliers from Southeast Asia. Things changed when suppy was difficult during the war. (image credit: Alfred T. Palmer, via Wikimedia Commons; Courtesy of United States Rubber Company)
The first wristwatches were worn by soldiers in order to allow the synchronisation of military manoeuvres on the battlefield without alerting the enemy. (image credit: Courtesy of Mapplin & Webb)
The classic walkie-talkie, like many things on this list, started life during WWII. (image credit: Farm Security Administration - Office of War Information Photograph Collection; Staff Sgt. Erik Cardenas, via Wikimedia Commons)
Ben Franklin originally invented pads to help stop wounded soldiers from bleeding while they received medical treatment. (image credit: Courtesy of the University of Minnesota; Gift of U.S. Department of Agriculture, through Dr. Arno Viehoever)
During WW2 blood serum was freeze-dried in order to the prevent it from spoiling during transport. (image credit: Via Wikimedia Commons)
The EpiPen started life in the military as an autoinjector intended for use by soldiers in the event of exposure to chemical warfare toxins and nerve agents. (image credit: Wikimedia Commons; Courtesy of Mylan.com)
The jerrycan was originally designed by Germany in the 1930s for military use to hold 20 litres of fuel. (image credit: Arche-foto, Burkhart Rüchel [CC BY-SA 3.0]; Naval Surface Warriors [CC BY-SA 2.0] via Wikimedia Commons)
The carnage and devastation of the First World War saw the need for the rapid development of blood banks and transfusion techniques.  (image credit: Ministry of Health; U.S. National Archives and Records Administration via Wikimedia Commons;)
In the years around WWII and after, the US military invested time and money in research into personal jetpacks and propulsion devices. (image credit: USGS Public Domain)
In around 1487, the very first ambulances appeared on the battlefield. (image credit: Wikimedia Commons; Look Sharp! [CC BY-SA 3.0] via Wikimedia Commons)
After WW2 the US took those German scientists involved in the V2 rocket programme back to the states to help them win the space race. (image credit: T5C. LOUIS WEINTRAUB; NASA/U.S. Army, via Wikimedia Commons)
In the 1990s, some of the satellites used for a space-based radio navigation systems were originally owned and operated by the United States government.  (image credit: USAF; Nachoman-au [CC-BY-SA-3.0] via Wikimedia Commons)
During World War II, an adhesive tape was invented that was made from a rubber-based adhesive applied to a durable duck cloth backing. (image credit: Evan-Amos; NASA/Eugene A. Cernan via Wikimedia Commons)
The humble drone began life as an unmanned aerial vehicle (UAV). (image credit: Bukvoed [CC BY 2.5] (http://creativecommons.org/licenses/by/2.5)], via Wikimedia Commons)
In the 1800s German physicists discovered that radio waves could be reflected from solid objects. It was later used to defend nations from attack. (image credit: NOAA's National Weather Service; Bidgee [CC BY 3.0] via Wikimedia Commons)
During WWII scientists were employed to find a material suitable for creating clear plastic gun sights. During this process, Superglue was accidentally born. (image credit: Courtesy of the Archives of the city of Kingsport; Super Glue Corp.)