No, it is false that major challenges facing freed blacks after emancipation included the burdens brought on by the sudden accumulation of wealth and property because the blacks remained very poor.
Wanting to limit British influence along their frontier, the French built a string of forts from Lake Erie towards the forks of the Ohio (present-day Pittsburgh). Because rivers were so important to transportation, the forks of the Ohio was a strategically important location, one that both nations wanted to control.