Ah yes, the Great Leap Forward, which was three years, followed by the American war in Vietnam, which was ten.

As for genocide, the Americans outsourced that one. Now they let others do their dirty work of slaughtering black people.

https://www.theguardian.com/world/2004/mar/31/usa.rwanda

President Bill Clinton's administration knew Rwanda was being engulfed by genocide in April 1994 but buried the information to justify its inaction, according to classified documents made available for the first time.

Senior officials privately used the word genocide within 16 days of the start of the killings, but chose not to do so publicly because the president had already decided not to intervene.

It took Hutu death squads three months from April 6 to murder an estimated 800,000 Tutsis and moderate Hutus and at each stage accurate, detailed reports were reaching Washington's top policymakers.

The documents undermine claims by Mr Clinton and his senior officials that they did not fully appreciate the scale and speed of the killings.

"It's powerful proof that they knew," said Alison des Forges, a Human Rights Watch researcher and authority on the genocide.