Answer:
Explanation: The 2003 invasion of Iraq was the first stage of the Iraq war when the US invaded. The US sent 150,000 troops to Iraq during the initial invasion phase of the war. They fought many fights and before the invasion many people were against it like 3 million people in Rome had an anti-war rally. The US invaded, because they wanted to disarm Iraq of their weapons of mass destruction, end Saddam Hussein's support for terrorism, and also to free the Iraqi people. The occupation was so difficult, because the US just invaded Iraq to meet a non-existent threat of proliferation and drive Saddam Hussein from power, but the following resulted after: crippled Iraqi military forces, deep sectarian conflict, ethnic divisions, the empowerment of Sunni extremists, and the creation of a new war. The US left Iraq in 2011, because they failed to negotiate a status-of-force agreement with the Iraqi government. The result for Iraq was the collapse of the Ba'athist government; Saddam Hussein was captured during Operation Red Dawn in December of that same year and executed three years later and there was an increase of sectarian politics, widespread violence and the rise of Islamic State militant group with their terror attacks throughout the middle east.