Sectarianism in Iraq

"The most serious sectarian and ethnic tensions in Iraq's modern history followed the 2003 US-led occupation, which faced massive popular opposition and resistance. The US had its own divide-and-rule policy, promoting Iraqi organisations founded on religion, ethnicity, nationality or sect rather than politics. Many senior officers in the newly formed Iraqi army came from these organisations and Saddam's army. This was exacerbated three years ago, when sectarian groups in Syria were backed by the US, Turkey, Saudi Arabia and Qatar." (thanks Amir)