Migrant workers in the Persian Gulf region point out the longstanding relationship between Indians and the Persian Gulf, where many stayed for generations and even became citizens. The second wave may be defined as the migration which took place after the British arrived in the Persian Gulf region in 1820. The British conflict with the Al Qasimi family, who held control over the Strait of Hormuz, started with the British refusal to pay toll for British ships passing through the Strait. Conflict broke out and the Qawasim fleet was destroyed. Pax Britannica was applied to the whole region, which included a series of treaties imposed on the
Persian Gulf the southern shore lines. During the 7th century the Sassanid Persian empire conquered the whole of the Persian Gulf, including southern and northern shores. Between 625 BC and 226 AD, the northern side was dominated by a succession of Persian empires including the Median, Achaemenid, Seleucid and Parthian empires. Under the leadership of the Achaemenid king Darius the Great (Darius I), Persian ships found their way to the Persian Gulf. Persian naval forces laid the foundation for a strong Persian maritime presence in Persian Gulf, that started with Darius I and existed until the arrival of the British East India