Answer :
The federal intervention in the 1894 Pullman Strike showed that The government considered mail delivery to be of vital importance.
Why did the federal government intervene in the Pullman Strike?
After workers on rail lines initiated the Pullman Strike, the federal government kept pressuring the local authorities to do more.
When the federal government felt it had allowed the mail to be disrupted for too long, it intervened directly and ended the strike. This showed the importance of mail delivery to the federal government.
Find out more on the Pullman Strike at https://brainly.com/question/798950.