He spent most of his reign trying to defend the upper part of his country from British encroachments , and to modernize his kingdom .
Mindon and his younger brother Kanaung overthrew their half brother King Pagan .
Mindon spent most of Mindon 's reign trying to defend the upper part of his country from British encroachments , and to modernize his kingdom .
Mindon and his younger brother Kanaung overthrew their half brother King Pagan .