United States President George W Bush on Tuesday said coalition forces are making "steady advance" in Iraq.

"We cannot know the duration of this war, yet we know its outcome; we will prevail. The Iraqi regime will be disarmed; the Iraqi regime will be ended; the Iraqi people will be free and the world will be more secure and peaceful," Bush, who was at the Pentagon to announce a budget request for a wartime supplementary of $74.7 billion, said.

"The enemy knows no rules of law, wears civilian clothes but meaning to kill in order to continue the reign of fear of Saddam Hussein," he said.

Bush said the coalition is strong and is bound together by the principle of protecting not only the US, but all nations from a brutal nation armed with weapons that can kill thousands of innocent people.

"America has more than 200,000 people engaged in Operation Iraqi Freedom. They also continue to fight bravely on other fronts in this war on terror. Last week, coalition forces launched an operation against terrorists and their allies in the southern mountains of Afghanistan," he said.

All members of the military, he said, are bound together by a great cause -- to defend the American people and advance the universal hope of freedom.

"We will not let our future to be decided by terrorist groups and terrorist regimes," he said.