Istanbul in the 1970s, as people from Anatolia migrated to the city to find employment in the many new factories that were built on the outskirts of the sprawling metropolis. This sudden, sharp rise in the city's population caused a large demand for housing, and many previously outlying villages and forests became engulfed into the metropolitan area of Istanbul. Istanbul is located in north-western Turkey within the Marmara Region on a total area of . The Bosphorus, which connects the Sea of Marmara to the Black Sea, divides the city into a European, Thracian side—comprising the historic and economic centers—and an
Strait of Tartary Strait of Tartary Strait of Tartary or Gulf of Tartary (; ; ; ) is a strait in the Pacific Ocean dividing the Russian island of Sakhalin from mainland Asia (South-East Russia), connecting the Sea of Okhotsk on the north with the Sea of Japan on the south. It is long, 4–20 m (13-66 ft) deep, and wide at the narrowest point. "Tartary" is an older name used by Europeans to refer to a vast region covering Inner Asia, Central Asia and North Asia. The toponym is derived from the Medieval ethnonym "Tartars", which was applied to various Turco-Mongol semi-nomadic