 In Canada, a ministry is formed when a new prime minister is appointed and dissolved when that individual leaves office.The one exception occurred in 1917, when incumbent Prime Minister Sir Robert Borden formed a new national unity government (the 10th Canadian Ministry) as a wartime coalition composed primarily of members of his own Conservative Party with some individual Liberal Party members of parliament.In contrast to various other Commonwealth realms (such as Australia and the United Kingdom) where a "new" ministry is considered to have been formed after every general election regardless of the winner, elections in Canada do not cause dissolution of the ministry unless they result in the government's defeat.