Complex sentence: Historic Fort Reno was built in 1874, and first commanded by General Sheridan, who named it in honor of his friend, Gen.Jesse L. Reno, who was killed in the civil war.
Split into simpler sentences: Historic Fort Reno was built in 1874, and first commanded by General Sheridan. He named it in honor of his friend, Gen. Jesse L. Reno, who was killed in the civil war.