Native American tribes, weather, the tail itself, illness, loss of food or cattle, and the distance of the trail for the time people were walking.
Pope Leo III<span>. </span>Pope<span> Saint </span>Leo III<span> (Latin: </span>Leo; fl. 12 June 816) was Pope<span> from 26 December 795 to his death in 816. Protected by </span>Charlemagne<span> from his enemies in Rome, he subsequently strengthened </span>Charlemagne's<span> position by crowning him Holy Roman Emperor and "Augustus of the Romans".</span>
The answer is b that it is B
Where is the map??? I can help if you show that