The French West Ridge Direct Expedition, 1974
The French Expedition of 1974 attempted the West Ridge Direct route, but ended fatally for all the six climbers of the expedition. French climber Gerard Devouassoux, along with five Sherpas, succumbed to death in an avalanche on their way to the summit. Their bodies were never found, and as a result, climbing Everest via the West Ridge was not attempted for the next five years.