a country that fiercely resists it. We learned that in Iraq and Afghanistan which were far easier opponents than the Ukrainians are, who have a real armed forces that is 200k strong with 200k reserves + volunteers with the West feeding them intelligence, weapons and aid. The US trained them to fight a guerilla war, anticipating this situation, and provisioned them with the appropriate weapons incl javelins ands stingers which are highly effective. They have home field advantage, lots of buildings/houses they can snipe from and throw molitov cocktails and other home made explosives. Even if Russia uses more brutal tactics and 'takes the capital' it's a pyrrhic victory as no gov't they install will last.