Hmm maybe for Czechoslovakia nation, Hussars are especcialy in Hungary(and Slovakia was a part of them), but no for Czechs. I have seen some units there - Jeep,which may be koda or Polish cavalry, which may be legionary in WW1 in the eastern front. BTW, after Revolution in Russia Soviets wanted stop war. Czechoslovakians legionares want go fighting in Western front, but soviets was fearing to their move to Petrograd and wanted bring them out. But Legionares captured Celjabinsk after attack from Soviet and Hungarian attack. So they were controlling transiberian magistrate(I dont know how its spelling in English, its railroad which is most influental link with European and Asian Russia) After some fights with forming Red Army they gave area to opposition and moved to Italy and France to won indepence on Austria-Hungary...