It is commonplace that the disunity among
the natives inevitably makes a state vulnerable, as it keeps them occupied in
their internal struggles which has the result of drawing their attention from
possible external conquests. A similar event occurred in ancient Sri Lanka, to
be more specific, during the Polonnaruwa
kingdom. Sri Lanka was marked by the Kalinga
Magha invasion in 1215 AD which
led to the fall of the Polonnaruwa
kingdom...
