Definitely, this one. Then You Shall Remain. I actually don't care much for the Storage Room episode.

You actually left out a lot of other episodes.

Sorry, may I please have a list so I can add 'em ? :)

I liked this one because I just learned a lot more about America and England :)

This was one of the only anime episodes I actually had tears in my eyes in. A Bientot was sad too, but it's a little bitter when you realise that the French government did, in fact, NOTHING to save Jeanne despite all the things she did for her country.

black_amaranth: My guess is because it was SO hot, correct? Yes, UsUk everywhere, because wars mean something sexual. Nothing to do with them being brothers at all. America SO left just to get in bed with him, because of course you leave to come back. And England was SO crying, because he wasn't loosing the person he raised from a child, but because he wanted to get in his bed too. Oh that is a good idea for a fanfiction! Why don't you go write it. (sarcasm)

C_Higurashi: I hope you don't mean history wise, because this is NOT the Rev. War. Bloody insulting actually. I actually showed that episode to my grandparents, I think my grandmother almost blew a blood vessel. And like my grandfather always does when he is angry/upset/annoyed, he starts mumbling is rapid french.

chocolate18: You forgot Chibitalia, it may had been funny, but it was still serious towards the end. Something can still be funny and serious at the sametime. Oh, and Russia's childhood, the World Series one. Love that episode, when Russia meets Lithuania.

Edvygrl: No, I don't consider the Revolutionary War a USUK moment at ALL. I never consider war a romantic thing. Also, keep in mind that the USUK fandom are not the only one that use war as shipping trigger. Plenty of other fandoms do that too. For God's sake, RusAme and AmeViet are pairings BASED on an atrocious war that occured between the two countries. In fact, America is pretty much shipped with every single country that he has had a war with, SpUK is often shipped during the timeline of the Armada War, and no matter what you say, several FrUK shippers also use the Hundred Years' War and the Norman conquests of Britain as shipping trigger as well. I could name several more examples, but I believe that I already gave you the idea.

First Hetalia episode to actually make me cry...

But "Though I May Depart, You Shall Remain" and "A bientot" were also so beautiful.

black_amaranth: Well I think that was her point...that people are sick for using war for pairing moments. And UsUk fandom does use the Rev. War a LOT in fanart and fanfictions, you can't deny that. That is like their number one excuss for that pairing.

And not that much of the FrUk fandom uses those as a reason, heck for my Reasons to Support FrUk, I only got one person who brought up that. And if I see someone using their wars they fought against each other, I always say something to them. Like this one FrUk blog is called HundredYearsWar, ticked me off and I told them they shouldn't do that.

PQ: Actually, not all of the USUK fandom sees the Revolutionary War n that way, and that's not our number one reason to ship. Also, the way she made it is as though we are the only fandom who do that, and my point wasn't just to deny that, but to also defend myself.

Uh, guys? Hetalia is a parody. I think the fact that some episodes aren't 100% historically correct and that the characters' interactions can be read as shonen-ai is just a part of the satire... is that just me?

And these three episodes are all so sad. Well, I feel like crying only when I watched the Storage Cleaning episode, but that's probably because I haven't read the strips before. I just thought "I've read this long ago, it does nothing for me anymore" when I watched the other two episodes.