What were challenges did early explorers faced?

When explorers encountered new people they exchanged diseases as well as goods. Diseases such as influenza and small pox caused untold deaths among American Indians. Diseases such as malaria, dysentery and yellow fever caused many deaths among ships crews.

Food & safe drinking water
Disease mostly cholera & dysentery
No maps or not good maps

France played a key role in the american revolutionary war (american war of independence; 1775–1783). motivated by the ideals of the new nation which were inspired by the french enlightenment, as well as its long-term rivalry with britain and so as to avenge their territorial losses during the french and indian war, france secretly began sending supplies to the americans in 1775.