Bahrain sits on archaeological evidence of the Dilmun civilization, which controlled trade routes between Mesopotamia and the Indus Valley from approximately 3000 BCE to 330 BCE. Cuneiform tablets from Ur and other Mesopotamian cities reference Dilmun as a source of copper and a transhipment point for goods moving between the Persian Gulf and the Indian Ocean. The Dilmun Burial Mounds, inscribed as a UNESCO World Heritage Site, contain approximately 11,700 tumuli dating from 2050 BCE to 1750 BCE, forming one of the largest prehistoric cemeteries in the ancient world. The site of Qal'at al-Bahrain, also UNESCO-listed, shows continuous occupation layers from 2300 BCE through the 16th century CE, with archaeological strata documenting Dilmun, Tylos (Hellenistic period), and Islamic-era settlements. Excavations at Qal'at al-Bahrain have uncovered Dilmun seals, pottery kilns, and evidence of a planned city with a defensive wall system. The ancient harbor associated with the fort served as a commercial hub connecting maritime trade networks across the Gulf region.
Portuguese forces occupied Bahrain in 1521, constructing fortifications at Qal'at al-Bahrain and establishing control over pearl fishing and maritime trade routes in the Persian Gulf. Portuguese documents from the period describe Bahrain as a strategic point for controlling access to the Shatt al-Arab waterway and protecting their Estado da Índia territories from Ottoman expansion. The Portuguese occupation ended in 1602 when Safavid Persian forces under Shah Abbas I expelled them and incorporated Bahrain into Persian administrative structures. Persian rule lasted until 1783, during which Bahrain remained under the authority of governors appointed from Shiraz. The Ajam community in Bahrain traces descent from this period, maintaining Persian language use and cultural practices distinct from the Arab population. Contemporary Bahrain includes neighborhoods in Manama and Muharraq where Ajam families have maintained Persian architectural styles and social institutions.
Ahmed al-Fateh led the Al Khalifa family and allied Utub tribal forces from Zubarah in Qatar to conquer Bahrain in 1783, ending Persian rule and establishing a dynasty that continues to govern. The Al Khalifa family had previously controlled Zubarah as a pearling and trading center before their expansion to Bahrain. After 1783, they designated Muharraq as the capital, which remained the seat of government until the mid-20th century when administrative functions shifted to Manama. Britain established formal treaty relations with Bahrain in 1820 through the General Maritime Treaty, which brought Bahrain into the Trucial System alongside other Gulf sheikhdoms. In 1861, Britain and Bahrain signed a perpetual treaty of peace and friendship, formalizing British protection and establishing Bahrain as a British protectorate with British responsibility for foreign affairs and defense. British political agents resided in Manama from 1900 onward, with substantial influence over succession disputes, administrative reforms, and oil concession negotiations.
Standard Oil of California (later Chevron) received an oil concession in Bahrain in 1930 and discovered oil at Jebel ad Dukhan in 1932, making Bahrain the first Arab state in the Persian Gulf to produce petroleum. Oil exports began in 1934 from a refinery built at Sitra, which processed both Bahraini crude and crude imported from Saudi Arabia via underwater pipeline. The Bahrain Petroleum Company (BAPCO) operated as the primary oil company until nationalization in 1980. Oil revenues transformed Bahrain from a pearling-based economy into a state with infrastructure development including roads, hospitals, and schools. The first government school in Bahrain opened in 1919, but the education system expanded significantly after 1930 with oil funding. By 1971, when Bahrain achieved independence from Britain on August 14, literacy rates had risen substantially from pre-oil levels, though comprehensive statistics from the 1930s are not reliably available.