How did the union army of tennessee under the leadership of general ulysses S. grant fight differently than the eastern half of the civil war?

Ulysses S. Grant was the most acclaimed Union general during the American Civil War[1] and was twice elected President. Grant began his military career as a cadet at the United States Military Academy at West Point in 1839. After graduation he went on to serve with distinction as a lieutenant in the Mexican–American War. Grant was a keen observer of the war and learned battle strategies serving under Generals Zachary Taylor and Winfield Scott. After the war Grant served at various posts especially in the Pacific Northwest; he was forced to retire from the service in 1854 due to accusations of drunkenness.[2] He was unable to make a success of farming and on the onset of the Civil War in April 1861, Grant was working as a clerk in his father's leather goods store in Galena, Illinois. When the war began his military experience was needed, and Congressman Elihu B. Washburne became his patron in political affairs and promotions in Illinois and nationwide.

Grant trained Union military recruits and was promoted to Colonel in June 1861. Maj. Gen. John C. Frémont, who viewed in Grant an "iron will" to win, appointed Grant to commander of the District of Cairo. Grant became famous around the nation after capturing Fort Donelson in February 1862 and was promoted to Major General by President Abraham Lincoln. After a series of decisive yet costly battles and victories at Shiloh, Vicksburg, and Chattanooga, Grant was promoted to Lieutenant General by President Lincoln in 1864 and given charge of all the Union Armies. Grant went on to defeat Robert E. Lee after another series of costly battles in the Overland Campaign, Petersburg, and Appomattox. After the Civil War, Grant was given his final promotion of General of the Armed Forces in 1866 and served until 1869. Grant's popularity as a Union war general enabled him to be elected two terms as the 18th President of the United States.

Some historians have viewed Grant as a "butcher" commander who in 1864 used attrition without regard to the lives of his own soldiers in order to kill off the enemy which could no longer replenish its losses.[3] Throughout the Civil War Grant's armies incurred approximately 154,000 casualties, while having inflicted 191,000 casualties on his opposing Confederate armies.[4] In terms of success, Grant was the only general during the Civil War who received the surrender of three Confederate armies.[3] Although Grant maintained high casualties during the Overland Campaign in 1864, his aggressive fighting strategy was in compliance with the U.S. government's strategic war aims.[3] Grant has recently been praised by historians for his "military genius", and viewed as a decisive general who emphasized movement and logistics.[5] Grant is considered Americas' first modern general, leading from a central command center, using common sense, and delivering coordinated attacks on the enemies armies.

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