The USA has a much stronger army, in fact the strongest army in the world. Realistically, nobody could defeat them. Russia would probably be the only country to come close. USA has a bigger army than Russia and stronger. Russia spends about 80 billion dollars on their military and weapons while USA spends over 580 billion dollars on there's. USA would win without a doubt
America spends over 580 billion dollars on the military while Russia spends only around 80 billion. America has 11 aircraft carriers while Russia has 1. America has missile bases in many european countries and maintains a military presence in tens of countries around the globe. America might even be able to take on the rest of the world in battle.