Stolen Generations

The Stolen Generations is a "blemished chapter in Australian history" comprised of various, ahem, "incidents" involving the Aboriginals, including: stealing all of their children. This was when hundreds of thousands of Australian native Aboriginal children were stolen from their families and given to white families to assimilate the new culture. This is part of the the classic British move called the "Invade, steal-natural-resources, and do-horrible-things-to-the-natives."

Apology
Australian prime minister Kevin Rudd officially apologized for this "incident" shortly after being elected against incumbent John Howard, who had refused to apoligize during his time in office.