Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. On April 9, 2003, Baghdad was formally secured. As the summer of 2003 gave way to autumn, the pattern of anti-occupation attacks shifted to include repeated, deadly suicide car bombings against high-profile targets in Baghdad, such as the headquarters of the UN and the Red Cross, foreign embassies, and police stations of the newly-formed post-Saddam Iraqi police force. At the same time, attacks on individual U.S. soldiers and vehicles, often in the form of buried roadside bombs, went on. The coalition counterinsurgency began on June 9, 2003 in response to an increase in guerilla attacks that began in late May. The invasion itself was swift, with the collapse of the Iraq government and the military of Iraq in about three weeks. Coalition forces moved into Baghdad with limited resistance; Iraqi government officials had either disappeared or had conceded defeat.