What country first explored Ohio, and claimed it as a territory
France.
under French rule until 1803, when all the French territory west of the Mississippi River was purchased by the United States.i.e. it was first claimed by France .
Portugal explored the New World first
Lewis and Clark.
Christopher Columbus, sailing for Spain, explored the Island of Hispaniola. He was the first European to reach that island in October of 1492.
Both England and France claimed land in North American .Which country's explorers first claimed the land? Answer this question…
Portugal
Louisiana was originally claimed by the Spanish but was first settled by the French.
Hernando de Soto claimed Louisiana in 1541
France
England
If you mean what European power first explored and settled Mexico during the Age of Exploration, Spain qualifies as such.