(CNN) -- In 1993, Romeo Dallaire was full of hope for the future of Rwanda. Romeo Dallaire, now a Canadian senator, says that in Rwanda, he "shook hands with the devil." The Canadian lieutenant general and son of a soldier was about to take up the biggest command of his career -- leading United Nations peacekeepers in the central African nation. A year later he left Rwanda a broken man, having watched helplessly as more than 800,000 people perished in Rwanda's genocide despite his pleas for more troops to stop the massacre. "We could have actually saved hundreds of thousands," Dallaire told CNN's Christiane Amanpour for "Scream Bloody Murder."
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In 1994, Romeo Dallaire was leading a U.N. peacekeeping force in Rwanda
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The Canadian lieutenant general warned his bosses that a slaughter was imminent
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Instead of sending reinforcements, the U.N. eventually ordered Dallaire to withdraw
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He refused what he calls an "immoral" order and ultimately left Africa a broken man
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