Conversation so far:
What was Operation Torch in World War II?
Operation Torch was an Anglo–American invasion of French North Africa during the Second World War.
What was the Operation Torch in World War II campaign about?
The French colonies in North Africa were dominated by the Vichy French, formally aligned Germany but with mixed loyalties. Reports indicated that they might support the Allies.
Was the Operation Torch in World War II campaign a success?
The success of Torch caused Admiral François Darlan to order co-operation with the Allies.

Question: what was avalanche?
Self-contained rewrite: What was Operation Avalanche in World War II?