South Vietnam was helped by US. Even when the US was gone, they had a 1 million army. So why did they lose? Even without US support, South Vietnam had about the same manpower, higher technology, and ...
It seems that during the breakup of Yugoslavia there were civil wars during speakers of the (then officially) same language - Serbs, Croats and Bosniaks, but not, e.g., between Serbs and Slovenians. ...