Chandragupta II

http://en.wikipedia.org/wiki/Gupta_Empire#Chandra_Gupta_II
he undertook invasions into present day Iran and surrounding territories to subdue the tribes existing there who were labelled barbarians.
the followers of the sangh parivar who are labouring under the illusion that the hindus are cowards and that they have to summon courage under the unique leadership of the RSS might be astonished at this information and scratch their heads in disbelief.
"this is impossible,we were taught that the hindus are cowards,gautier also told us something else."

what these events suggest is that when a religion attains a newer and higher stage of development,the rulers and the martial classes are given the convictions to undertake military campaigns against the people who are not a part of their evolved religion.
the same campaign by chandragupta II would have been repeated in the reverse direction by the peoples of the middle east after they received islam,with the indians being the ones labelled as barbarians.