Dentarg vs Death Knight

Plains of snow on low

I started 5.00 and he 10.00. I build my TH then goes to mine more gold....... After my 4th farm I build a barack, when it is building I see a red grunt as visit me. I kill him whit my peons but then is it coming more grunts, my barack is ready so I start build grunts, but they all killed. Then a find a peon to escape whit, soon he find me and a ogre kill him.