Film Lesson: "Mountains of the Moon"

In the movie the europeans had faced many obstacles in finding the main source in the nile river, which were moskitos that carried malaria, african tribes that tortured and killed people, and lions. It is strange to most why the source of the Nile River is named after a british queen. The reason why I think this river was named Lake victoria was because one of the two men from europe just came up with the name.
One technological advantage the europeans had over the africans was their weaponry. The africans had spears and the europeans had guns. Obviously guns are more sufficient than guns.