Which two political parties merged to form the Conservative Party of Canada?

The Conservative Party of Canada was formed in 2003 through the merger of the Canadian Alliance and the Progressive Conservative Party of Canada.12

This merger was engineered by Stephen Harper, who was serving as the leader of the Canadian Alliance at the time, to unite the political right and create a more effective challenge to the governing Liberal Party of Canada. Following the merger, the new party was officially registered on December 8, 2003, and Harper subsequently became its first leader.134