During the war, many Jayhawkers stayed in Lawrence. These Jayhawkers went to Missouri. They stole items and burned farms there. Many people in the Confederacy believed that the stolen items were in Lawrence. On August 21, 1863, a pro-slavery man named William Quantrill rode into Lawrence with some men. They destroyed much of the town. They killed every adult man they saw. More than 150 men and boys died. There was 2,000,000 dollars worth of property destroyed. The Plymouth Congregational Church was not destroyed, but many of its people died. This attack is known as the Lawrence massacre.