During this time, the Canadian colonies were beginning to organise themselves into a confederation. The American Civil War had just broken out, and the Trent Affair caused diplomatic tension between the United States and Britain. The Canadian government was eager to gain some measure of independence during this turbulent period. The Quebec Conference, the Charlottetown Conference, and the London Conference, at which the details of confederation were discussed, all took place during Monck's time as governor. Monck supported the idea, and worked closely with John A. Macdonald, George Brown, George-Étienne Cartier, and Étienne-Paschal Taché, who formed the "Great Coalition" in 1864.