The uncertainty surrounding Missouri's status as a slave state caused a rapid out-migration of slaveholders into Arkansas. Slavery also became a divisive issue within Arkansas. The wealthy planters of southeast Arkansas strongly supported slavery since manual labor was the only method of harvesting cotton at the time. The northwest parts of the state did not have cotton plantations, and as little as 2% of the black population in northwest Arkansas was enslaved during the territorial era. However, northwest Arkansas backed slavery in support of the southeastern Arkansas planters.