请英语好的帮我改一下里面语序和语法的错误好吗?

请英语好的帮我改一下里面语序和语法的错误好吗?
The Iraq War began on March 20,2003,the United States and the UK-based Joint Forces announced war against Iraq,The Iraqi capital Baghdad,at 0:00 on the 20th U.S.air strike explosion sounded.U.S.President George W.Bush in the White House later announced that the U.S.and its allies launched military strikes against Iraq began,marking the formal outbreak of the war in Iraq.Australia and Poland army also participated in this joint military action .It because On the one hand in order to plunder the Iraq rich in oil resources,on the one hand,the United States thought Iraq has weapons of mass destruction,biological weapons.To curb the development of Iraq,and the contradiction between the United States and Iraq's increasingly darker,U.S.President George W.Bush on Iraq war.
However on October 21,2011,President Obama announced that all U.S.troops and trainers would leave Iraq by the end of the year,bringing the U.S.mission in Iraq to an end.
关于伊拉克战争的。由于部分是用有道直接翻译的 所以可能有些地方不妥。会提高奖赏哦~