A military invention is an invention that was first created by a military.
There are many inventions that were originally created by the military and subsequently found civilian uses.
Many have found dual usage in both sectors.
France United States (Alfred J.
Gross, Motorola SCR-300) United States Soviet Union United Kingdom Canada (Manhattan Project) United Kingdom (Frank Whittle) Soviet Union United Kingdom (NPL network)[4] France (CYCLADES)[4] Soviet Union France