Aceh Sultanate
The Ottoman expedition to Aceh started from around 1565 when the Ottoman Empire endeavoured to support the Aceh Sultanate in its fight against the Portuguese Empire in Malacca. The expedition followed an envoy sent by the Acehnese Sultan Alauddin Riayat Syah al-Kahhar (1539–71) to Suleiman the Magnificent in 1564, and possibly as early as 1562, requesting Ottoman support against the Portuguese.