<human>:  Why did the Union lose at the Battle of Shiloh?
<bot>: The Union army was outnumbered by the Confederates. The Confederates were led by General Albert Sidney Johnston, who was a brilliant tactician. The Union army was led by General Ulysses S. Grant, who was a great general but was not a very good strategist. Grant was not able to figure out a way to counter the Confederates’ strategy.