U.S. President Barack Obama on Tuesday announced the end of combat operations in Iraq, saying the United States has met its responsibility, and "it is time to turn the page."

According to agreements between the two governments, U.S. troops are due to end combat mission in Iraq on Aug. 31, and will transition into a mission to mainly advise and assist Iraqi security forces. The Pentagon said the remaining 50,000 U.S. troops will also support Iraqi troops in targeted counter-terrorism missions, and protect U.S. civilians.

United States has spent over 7,000 billion U.S. dollars in the war, with more than 4,400 troops killed and more than 30,000 others wounded. Overall costs of the war could amount to three trillion dollars if medical expenses for injured veterans are counted.

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