Who did the general in the Union Army during the American Civil War pave the way for the surrender of Fort Donelson, who later became the 18th President of the United States?
Ulysses S. Grant
Title: Daniel Smith Donelson
Passage: Daniel Smith Donelson (June 23, 1801 – April 17, 1863) was a Tennessee politician and soldier.  The historic river-port of Fort Donelson was named for him as a Brigadier in the Tennessee militia, early in the American Civil War, in which he went on to serve as a Confederate general, notably at Perryville and Stones River.  He was the nephew of America's seventh president, Andrew Jackson.
Title: Ulysses S. Grant
Passage: Ulysses S. Grant, born Hiram Ulysses Grant , (April 27, 1822 – July 23, 1885) was the Commanding General of the United States Army at the end of the American Civil War and later the 18th President of the United States from 1869 to 1877.  As Commanding General, Grant worked closely with President Abraham Lincoln to lead the Union Army to victory over the Confederacy in the Civil War.  Supported by Congress, Grant implemented Reconstruction, often at odds with President Andrew Johnson.  Twice elected president, Grant led the Republicans in their effort to remove the vestiges of Confederate nationalism and slavery, protect African-American citizenship, and support economic prosperity.  Although his presidency has often been criticized for multiple administration scandals and for his failure to alleviate the economic depression following the Panic of 1873, he is regarded as a President who performed relatively well in the context of his time and pursued justice for all.
Title: James M. Tuttle
Passage: James Madison Tuttle (September 24, 1823 – October 24, 1892) was a soldier, businessman, and politician from the state of Iowa who served as a general in the Union Army during the American Civil War.  He commanded a brigade and then a division in the Army of the Tennessee in several campaigns in the Western Theater of operations.  He led the first Union troops that entered the enemy-held Fort Donelson in 1862, paving the way for the fort's subsequent surrender to Ulysses S. Grant and opening the Cumberland River as an avenue of invasion of the South.
James M. Tuttle Ulysses S. Grant