When war broke out between the US and Britain, the US Army defeated the British at the US-Canadas border, and drove into the Canadas. The British attempted to hold the line near Ottawa, resulting in a second major battle, but Yankees defeated them and captured the city.
Ottawa was the capital of Canada, chosen by Queen Victoria herself. When the Racelanded in mid-1942, they bombed the city, but not as thoroughly as they did with cities in the US. When peace was declared in 1944, the city hadn't suffered too badly and was easily repaired in the years after.
In late 1964, David Goldfarb and his family were detained in Ottawa when they attempted to immigrate from Great Britain to Canada. Because David had been involved in ginger-smuggling in the Greater German Reich, the Canadian government detained the family until they were satisfied that they would pose no risk to the country. To Goldfarb, the city looked brand new compared with those in England and Northern Ireland.