If one morning Putin decided to conquer all of Europe... would he succeed?
Russia has a total troop count of 3.7 million. If it went to war with the Baltic states, Finland, Ukraine and Poland. They would certainly win as their missile forces are more than ample to seriously damage the fighting capability of those countries. If it went onto Germany, I believe Russia would easily defeat them because the German armed forces are tiny... they only have around 200 to 300 thousand troops (active and reserve). France? It would certainly be defeated as easily as it was defeated by the Germans in the past within mere weeks. Russia would then go onto Spain and Spain would probably lose pretty fast since its land force is pretty small... not likely sufficient to defend against a Russian incursion. The UK will be a bit more challenging since the Russian navy will have to go up against a pretty modern naval force but in the end I believe the Russians can triumph against the British navy by nuking their ships.