For more information on commandant when used as a position, see Commandant.
Commandant (t/ or t/) is a military or police rank. In the French, Spanish, Irish and Monegasque armed forces it is a rank equivalent to major. In South Africa for most of the second half of the 20th century, commandant was a rank equivalent to lieutenant-colonel.
Commandant d'aviation was the Canadian French term for the air force rank of squadron leader (prior to the 2014 amendment of the National Defence Act). The rank of squadron leader itself had not been held by active duty personnel in the Canadian Forces since 1968 when it was replaced by major.