10. Who is credited with establishing the first accessible route to the western United States, known as the Oregon Trail?

Robert Stuart of Astoria

Explanation:

Fur traders had reports and books written about their adventures out west.

Following World War II, rapid decolonisation swept across the continent of Africa as many territories gained their independence from European colonisation. ... Consumed with post-war debt, European powers were no longer able to afford the resources needed to maintain control of their African colonies.

Hope this helps:)