Final answer:
The Pullman Strike of 1894 was ended by federal troop intervention to ensure the movement of trains and U.S. mail.
Step-by-step explanation:
The strike that was ended by the intervention of federal troops because of destruction done to train locomotives and cars was the Pullman Strike. This historical labor dispute occurred in the summer of 1894 when workers at the town of Pullman, Illinois, declared a strike in response to wage reductions while rents and prices at the company-owned homes and stores remained high.
President Grover Cleveland intervened by deploying federal troops to ensure that trains, particularly those carrying U.S. mail, were not disrupted by the strike. The federal government's decisive action under the pretense of protecting the mail service led to the end of the strike.