Complex sentence: Assigned to Company A, Crump saw action at the Battle of Hatcher's Run, participated in the siege and Battle of Petersburg before witnessing General Robert E. Lee's surrender at Appomattox Courthouse, and later attended Lee's official surrender to Union General Ulysses S. Grant.
Split into simpler sentences: Assigned to Company A, Crump saw action at the Battle of Hatcher's Run, participated in the siege and Battle of Petersburg before witnessing General Robert E. Lee's surrender at Appomattox Courthouse. He also attended Lee's official surrender to Union General Ulysses S. Grant.