Bomba, Ty. "Outgoing Mail"
Divergence: 1846 CE
What if: Exploiting a border dispute, Mexico's improved army invaded Texas in 1846 and made for New Orleans, where a vicious siege occurred.
Summary: Provoked by the attack, the US government revises the Monroe Doctrine to mean US control of all North America, resulting in an Imperial Republic.
Published: In Strategy & Tactics, June/July 1989.