By the end Process_end of the operation the Marines of Lima Company Group had covered over 60 km on foot in the most arduous conditions .

According to John Laffin , the campaign `` was arguably the most arduous fought Hostile_encounter by any Allied troops during World War II '' .

Montgomery 's army had captured Conquering Montreal on November 13 , and early in December they became Becoming one force that was led by Arnold , whose men had made Manufacturing an arduous trek Self_motion through the wilderness of northern New England .