> It's really hard to see how Ukraine will successfully fend off a country 10x its size. (If someone has an answer as to why that might be realistic, I'm open to hear it).
Firstly, the size of a country doesn't immediately matter, it's more about the size of the army. E.g. China 50 years ago was bigger than the US, but couldn't "win" in a war with the US.
Having said that, wars are a political tool. For the most part, wars aren't about fighting until you "kill everyone" or anything like that. They are fought to achieve certain goals, and end when one side decides its goals aren't worth the price of the fight.
This is true in all situations - even in a war of conquest. Ukraine will put up a huge fight, because the goal is to stop themselves from being conquered. But there could come a point where they decide to surrender, because the death toll will be too high (or because the leadership is captured and threatened, or because the army is too fatigued to continue fighting and surrenders without the leadership, etc).
Likewise, it's possible that Russia decides to stop the fighting. This could be because they decide it's weakening the army too much (too many soldiers dying and munitions being used up). Or it could be because internal public opinion is too heavily against the war. It could even be for reasons that are only internally visible, like that Putin starts feeling that his position is threatened because of the war.
All Ukraine has to do is to keep up their resistance long enough for the war to not be worth continuing from Russia's side. Or for the rest of the world to decide to help more than they are, which is why Zelensky's main goal is to keep the front-and-center in the West's consciousness. How long that is (if it's even possible) nobody knows.
Firstly, the size of a country doesn't immediately matter, it's more about the size of the army. E.g. China 50 years ago was bigger than the US, but couldn't "win" in a war with the US.
Having said that, wars are a political tool. For the most part, wars aren't about fighting until you "kill everyone" or anything like that. They are fought to achieve certain goals, and end when one side decides its goals aren't worth the price of the fight.
This is true in all situations - even in a war of conquest. Ukraine will put up a huge fight, because the goal is to stop themselves from being conquered. But there could come a point where they decide to surrender, because the death toll will be too high (or because the leadership is captured and threatened, or because the army is too fatigued to continue fighting and surrenders without the leadership, etc).
Likewise, it's possible that Russia decides to stop the fighting. This could be because they decide it's weakening the army too much (too many soldiers dying and munitions being used up). Or it could be because internal public opinion is too heavily against the war. It could even be for reasons that are only internally visible, like that Putin starts feeling that his position is threatened because of the war.
All Ukraine has to do is to keep up their resistance long enough for the war to not be worth continuing from Russia's side. Or for the rest of the world to decide to help more than they are, which is why Zelensky's main goal is to keep the front-and-center in the West's consciousness. How long that is (if it's even possible) nobody knows.