The United States experienced numerous oil and gas shortages across the 1970s, thanks to instability in the Middle East.

The worst of these came near the end of 1973 when Egypt attempted to take back the Sinai Peninsula from Israel during the Yom Kippur war.

Pledging American support to Israel during the war, President Nixon prompted OAPEC nations to respond with an embargo on United States oil exports. 

Here are 20 photos of the 1973-1974 oil crisis, which most drastically impacted the Pacific Northwest.