 Complete the following phrase:  In the late 1990s, UN-authorised international interventions took a wider variety of forms. The UN mission in the 19912002 Sierra Leone Civil War was supplemented by British Royal Marines, and the UN-authorised 2001 invasion of Afghanistan was overseen by NATO. In 2003, the US invaded Iraq despite failing to pass a UN Security Council resolution for authorization, prompting a new round of questioning of the organizations effectiveness. In the same decade, the Security Council intervened with peacekeepers in crises including the 