..that gets acquired/'liberated'/copied by a non-major country, so they can outfit their armed forces on the cheap. Major countries being USA, USSR, UK - they already have more than needed, while Germany, Italy and Japan will have to wait a bit more to build or rebuild their armed forces. So typically it is France, Sweden, Belgium, Finland, Yugoslavia, Spain, Denmark, Turkey, Czechoslovakia, Poland etc, a host of Latin American countries, as well as a number of Asian and African countries.
Gear should be useful for a decade to two decades. Don't choose too many different designs - maintenance and training are important, too. Slight modifications are allowed.
Countries are not picky - anything from either Allied or Axis arsenals can be looked onto, with quirk that stuff from 'major' countries will not be easy to copy as-is in a legal way, while LL stuff needs to be paid for, returned or destroyed.
Please note again - thread is about Army hardware - small and big guns, vehicles armored and unarmored, tracked and wheeled.