Why did falcata style weapons disappear?

[blitzkrieg80]

schiltron (a formation wich was older anyway - as far as I know the korean spearmen that the huns brought along with them used the schiltron... I might be wrong though).

wow, that is possibly the most hypothetical statement i've read in a long time! KOREANS amidst the Huns?!!? Believe it or not, Hsiung-Nu does not equal Huns (even if that shatters the Classical myth of 'no new peoples')... even inclusion of Proto-Turks would not sound too far-fetched, but Koreans as we know them!? might as well throw in some Japanese... i'm glad that we're still trying to hold to the idea that dumb barbarians couldn't possibly know something and had to have it given to them by advanced civilizations - that is so wonderful and enlightened

the schiltron is not so advanced that it was some Eastern-specific innovation. similarly, the West did not invent the shield-wall, believe it or not.
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Emperor Burakuku, I actually think your other points are quite valid, esp. concerning the T-34 tank which was awesome, but wasn't the 'best.'