their homes in the middle of the winter of 1862. Union Major General Henry Halleck on January 18, 1862 in a letter to General Lorenzo Thomas described Jennison's regiment as "no better than a band of robbers; they cross the line, rob, steal, plunder, and burn whatever they can lay their hands upon. They disgrace the name and uniform of American soldiers and are driving good Union men into the ranks of the secession army."Major General Henry Halleck to Brigadier General Lorenzo Thomas, January 18, 1862. In The War of the Rebellion: A Compilation of the Official Records of the War of the Union and Confederate Armies. Washington, DC: Government Printing Office, 1880-1901, series 1, volume 8, pp. 448-449 There were no charges against Lane, Jennison, or other officers under Lane's command for their role in the jayhawking raids of 1861–1862, but Union General David H. Hunter succeeded in curtailing Lane's military role, and units of Kansas troops such as the 7th Regiment Kansas Volunteer Cavalry were shuffled off to other theaters of the war. Further compounding confusion over what the term Jayhawker meant along the Missouri–Kansas border was its use in describing outright criminals like Marshall Cleveland, a captain of Jennison's Regiment, who resigned and turned to jayhawking. Cleveland operated under cover of supposed Unionism, but was outside the Union military command. A newspaper reporter traveling through Kansas in 1863 provided definitions of jayhawker and associated terms: Guerrilla fighting The depredations of the Jayhawkers contributed to the descent of the Missouri–Kansas border region into some of the most vicious guerrilla fighting of the Civil War. In the first year of the war, much of the movable wealth in western Missouri had been transferred to Kansas, and large swaths of western Missouri had been laid waste, by an assortment of Kansas Jayhawkers ranging from outlaws and independent military bands to rogue federal troops such as Lane's Brigade and Jennison's Jayhawkers. In February 1862, the Union command instituted martial law due to "the crime of armed depredations or jay-hawking having reached a height dangerous to the peace and posterity to the whole State (Kansas) and seriously compromising the Union cause in the border counties of Missouri." One expert on the Jayhawkers stated that the Border War would have been bad enough given the fighting between secessionist and unionist Missourians, "but it was basically Kansas craving for revenge and Kansas craving for