Complex sentence: General Huang Wei's attempt to breakout from communist blockade was foiled when his division commander went over to communists with his unit and he was captured alive, only his deputy commander General Hu Lian was able to escape back to Nanjing.
Split into simpler sentences: General Huang Wei's attempt to breakout from communist blockade was foiled when his division commander went over to communists with his unit. He tried to break out but was captured alive, only his deputy commander General Hu Lian was able to escape back to Nanjing.