after a six week siege what city surrendered to grant's army
Siege of Vicksburg Vicksburg was the last major Confederate stronghold on the Mississippi River; therefore, capturing it completed the second part of the Northern strategy, the Anaconda Plan. When two major assaults (May 19 and 22, 1863) against the Confederate fortifications were repulsed with heavy casualties, Grant decided to besiege the city beginning on May 25. After holding out for more than forty days, with their reinforcement and supplies nearly gone, the garrison finally surrendered on July 4.