Taylor, his logistics in order by August, had begun his advance on Monterrey, traveling through the virtual Federalist stronghold that is northern Mexico and receiving increasing support from the anti-Centralist rebels.

Taylor’s force reaches the fortified town in September 19, 1846, and attacks the more than ten thousand-man garrison two days later.

The hard-fought Battle of Monterrey results in serious losses on both sides.

The American light artillery is ineffective against the stone fortifications of the city.

The Mexican forces are under General Pedro de Ampudia and repulse Taylor's best infantry division at Fort Teneria.

After the twenty thousand men under General William J. Worth capture the road between Saltillo and Monterrey, Worth sends six companies of Texas rangers up Federation Hill as a diversionary force attacks the town from the opposite side of the city.

The Rangers seize the Mexican artillery and turn it on the retreating enemy forces.