 Although not announced until later, a small number of U.S. Special Forces troops accompanied Ethiopian and TFG troops after the collapse and withdrawal of the ICU to give military advice and to track suspected al-Qaida fighters.Both American support for the TFG and various Arab Nations' support for the ICU were isolated cases from the central motive of the war between the allied Ethiopian & Somali government forces and the allied ICU & Eritrean forces.As of January 2007, Ethiopia said it would withdraw "within a few weeks" but the TFG, US and UN officials oppose Ethiopian withdrawal because it would create a "security vacuum," while the ICU has demanded immediate Ethiopian withdrawal.