British and Canadian forces cross the English Channel toward a raid in Dieppe, France, during World War II

The video describes a military operation involving Canadians, Britishers, and American Rangers boarding transports and setting sail across the English Channel. Spitfires and bombers take off from British airfields at dawn to provide air support. The mission is to protect a commando force targeting a French seaport.

How many Britishers were involved in the operation?

What was the target location for the commando force?