Molotov cocktail
During the early part of World War II, when Finland refused to surrender some land to the Soviet Union, the Soviets invaded it. The poorly equipped and heavily outnumbered Finnish Army faced Red Army tanks in what came to be known as the Winter War. The army borrowed an improvised incendiary device from the 1936–39 Spanish Civil War. In that conflict, the Spanish Nationalists under the orders of General Francisco Franco had used the weapon against Soviet T-26 tanks. Those tanks helped the Spanish Republicans in a failed 1936 Soviet assault near Toledo, 30 km from Madrid.