All of this activity, of course, incited the Comanches, so U.S.-Texans tried to control them by: using their historic enemy, the Jumanos to track and viciously kill them all immediately, no matter their family size, because the U.S. Texans had little empathy. O setting up major reservations in 1855. rounding up the Native Americans and sending them back to Florida, aka, The Great Reverse E- S-R-E-V-E-R Trail of Tears