Territories of Kansas and Nebraska
Black Hawk was not sorry for rebelling, he was defending his land and his people from what he called "cheating men" because they took the land they had known for thousand of years by force and made them go to lands they could not grow enough food on.
<span>An increase in scientific and medical discoveries improved life expectancies.
</span>The best possible explanation for the changes in Europe's population since 1750 is that an increase in scientific and medical discoveries improved life expectancies.In fact, it was around this type that basic hygiene norms were implemented, as well as some mortal diseases were cured or to improve lifbetter treated. Moreover, the discovery of vaccinations helped greatly to improve life expectancies.
the answer to your question is a) they had advanced planning and developed effective military methods.