The 9th Cavalry was a real all-Black regiment in the US Army that was established in 1866 after the Civil War. As this episode portrays, the 9th and 10th Cavalry Regiments were engaged in battles with indigenous nations in the Plains as the US colonizers expanded westward.
This is the third time that Sully wears a blue bandanna.
Miss Dorothy is replacing a male school teacher.
Miss Dorothy gives the school children only one day to prepare for the state exam.
It is impressive that Dr. Quinn had a jar of tomatoes in her clinic the same day she diagnosed a patient with scurvy.