collaboration, joint action, combined effort, teamwork, partnership, coordination, liaison, association, synergy, synergism, give and take, compromise
The answer is The Pony Express was invaluable during the national crisis.
Pony Express started in the 1800s when three men had put up a mail delivery system that would reach from Midwest to California. The design of the system connected a number of over one hundred stations, each almost two hundred forty miles long, across the country. It had given a needed service but it was never quite the financial success it was envisioned to be.
We frequently read story books.
