yes
Oregon country
Saint Lawrence River is in North America.
Mouth of the river is - The Gulf of Saint Lawrence/Atlantic Ocean
Hernando de soto explored the areas along the southern half of the Mississippi River.
Jacques Marquette found the Mississippi River ,Arkansas River and the Chicago River .
Champlain and Cartier explored the st. Lawrence river .
France
Cartier.
No
Jacques Cartier was sponsored by France to start a French colony in the New World. He explored that St. Lawrence River Valley.
Jacques Cartier
Jacques Cartier was a French navigator who explored and claimed for France. He was the first European explorer to discover the St. Lawrence River.
France, Jacques Cartier had discovered it in his first voyage.
Samuel de Champlain
It's The Mississippi River And St. Lawrence
Cartier explored much of the Gulf of St Lawrence and also explored the St Lawrence River as far as present day Montreal.
Jacques Cartier