1847 10 Apr. 86/3 He discovered an Arkansas volunteer... ‘What is the matter?’ inquired the major. ‘Why,’ answered the Rackensacker, ‘I was sitting on the bank [etc.]’.
1906 3 152 She and I are both Rackensackers.
2005 L. Sonneborn iv. 35 The Rackensackers were an especially wild group of volunteers from Arkansas.