General George Casey will complete his tour as Army Chief of Staff later this spring. Gen. Martin Dempsey is expected to replace him. If President Barack Obama accepts and nominates Dempsey, he would have to be confirmed by the Senate. Dempsey is now commander of Army Training and Doctrine Command and previously was acting commander of Central Command. He also led the multi-national training effort in Iraq and commanded the 1st Armored Division in Baghdad.