Cambodia has witnessed some gruesome history and for a long time, there were security concerns. Although all these concerns have been addressed, the history can take you quite aback. During the rogue rule of the Khmer, there were around 2,000,000 people who were killed which is actually 1/5th of the local population here. Due to the genocide of the 1975 to 1979 period, around 63% of the country's population is below thirty years of age.