What was the main reason that the French built Fort Duquesne?

Answer 1

The French built Fort Duquesne primarily to assert their control over the strategically important Ohio River Valley, which was a critical area for trade and military movements. This fortification aimed to strengthen French territorial claims against British expansion and protect their fur trade interests in the region. The establishment of Fort Duquesne was part of the larger conflict between French and British colonial powers in North America, ultimately contributing to the outbreak of the French and Indian War.