US and Canadian joint military exercise Operation Sweetbriar: soldiers and Weasels in snow

Operation's senior officers including Major General Penhale, Lt. General Stephen Chamberlin, and Air Marshal Clearence Dunlap / WS snow-covered mountains and countryside, man walks down roadway as Weasel passes away from camera, smoke or exhaust trails; another Weasel follows towing cart with supplies sliding on snow / Weasels from behind moving between trees / vehicles moving between trees / soldiers in dark clothing on skis moving single file through snow, trees and mountains in bg / soldiers from behind / various shots plane in air, mountains in bg / soldiers on skis / soldiers seen through branches / MS Penhale, Chamberlin and Dunlap referring to map / CU Penhale; pan to Chamberlin; pan to Dunlap / CU Chamberlin / the officers walking to camera / soldier in white nestled in snow firing machine gun / various shots soldiers wearing dark firing rifles / soldiers / various shots soldiers handling field gun / Note: exact day not known