The story begins in Pennsylvania and the Caspian region, where crude oil was first extracted in commercial quantities. With limited rail networks, producers relied on river barges along the Allegheny and the Caspian Sea to ship barrels to nearby refineries. The 1869 opening of the Suez Canal instantly transformed maritime logistics, allowing the first ocean‑crossing shipments from the Persian Gulf to European markets.
By the early 1900s, new fields in Texas, Venezuela, and the Middle East enlarged the supply base. Advances in steel‑capped tankers enabled longer voyages without frequent stops, while strategic pipelines such as the Baku‑Batumi line linked inland wells to Black Sea ports. Colonial powers and emerging oil companies raced to claim these routes, turning raw material transport into a cornerstone of global commerce.