In cambodia, who was the leader of the khmer rouge who caused the deaths of 22% of the country's population within less than four years?

What does the author most likely say the time for negotiating with britain was over

The area directly outside a city is called 1 rural 2 urban 3 suburban

Did the spanish settlers and missions have a positive effect on world history? why, what did they do that was positive? why was the treaty of paris (1763) good for the world/world history? did the plymouth colony have a positive effect on world history? why, what did they do that was positive?