Right, now look at where "from" and "to" are in my sentence.
During and for years after WWII, the US was a major net exporter of oil, which is why I felt the need to specify the approximate start (some time in the 1950s or early 1960s) of the US's dependence on imported oil.
During and for years after WWII, the US was a major net exporter of oil, which is why I felt the need to specify the approximate start (some time in the 1950s or early 1960s) of the US's dependence on imported oil.