Both fort st. jean baptiste and new orleans were built to

protect French claims on land from the Spanish and the British.

Explanation:

During the early years of the country, many territories were in dispute. This is because many areas had only recently began to be explored, and this allowed different European powers to claim them for themselves. The French were aware of this risk, and in order to protect French claims on the land they controlled, they built both Fort St. Jean Baptiste and New Orleans.

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