Proslavery movements against Lawrence began again in earnest on May 11, 1856. On that day, US Marshal Donaldson issued a proclamation calling for a large posse to help him serve his process in the town. He wanted one as big as Kansas and Missouri could manage. Proslavery men, including some from Jefferson Buford’s expedition, happily obliged him. As they gathered, harassing people moving about Lawrence and killing two antislavery men, Donaldson remained at Lecompton. There the majority of the force assembled, as he had asked it to, and he and Governor Shannon heard desperate pleas from Lawrence for aid. Much of the free state leadership had fled, leaving the town with a committee of safety caught between internal divisions and a marked lack of realistic options. On the twentieth, his deputy entered Lawrence and had a few conversations. He left unmolested, thus demonstrating how much Donaldson required overwhelming force to carry out his duties.
Not that it mattered. Donaldson had between five and eight hundred men bent on doing something to Lawrence, whatever excuse they could get. They included David Rice Atchison, who had done so much to inaugurate Kansas’ troubles. Atchison’s Senate term had expired the year before, but he still hoped he might get another out of Missouri’s legislature. Divided, they instead left the seat open until 1857. The former Senator came into Kansas in the company of the Platte County Self-Defensives and two field pieces. The Kickapoo Rangers, who had killed Reese Brown, joined in as well. To them, William Phillips added
all the loafers and wild pro-slavery men from Leavenworth and Weston […] General Stringfellow had crossed from Missouri to Atchison, and reinforced by his brother , the doctor (who is the more eminent of the two), and the infamous Bob Kelly, Stringfellow’s law partner Abell, and several other pro-slavery men there, had gone to Lecompton. Colonel Boone, from Westport, with several other pro-slavery leaders from that place, and also from Liberty and Independence, at the head of bodies of armed men, or to take command of companies that had preceded them
A separate force had established itself at Franklin, under Buford. Phillips puts United States arms in their hands, given out by “federal appointees of Kansas.” That probably meant Donaldson, though Phillips doesn’t name him. Buford’s men had two cannons of their own.
The Lecompton force broke camp in the predawn hours of May 21, on the move at last. They arrived “shortly after sunrise” and occupied the heights of Mount Oread overlooking Lawrence, near Charles Robinson’s house.
The town was perfectly quiet. Its inhabitants were shaking off their slumbers; those already astir were going quietly about their avocations. No guns were planted upon the embankments. No lines of riflemen were drawn up. The cry was, “Peace! peace! when there was no peace.