Davao Oriental: History
=== Early history ===
The present territory of Davao Oriental was covered by the historical region of Caraga, which was partly under the Sultanate of Maguindanao.
The Spaniards established a permanent settlement in the region in 1591, and in 1844, the area was ceded by the Sultanate to Spain. An expedition was sent by the colonial government in Manila in 1847 to control the region, led by the Spaniard Jose Oyanguren, who settled in the town of Davao and organized the surrounding areas into the province of Nueva Guipozcoa in 1849. The province existed until 1858, when the politico-military commandancias of Davao and Bislig were created in its place. Bislig was incorporated into the District of Davao two years later.
In 1903, the colonial American government created the Moro Province comprising several districts, one of which was Davao. The Moro province was converted in 1914 into the Department of Mindanao and Sulu, and its component districts were made into independent provinces.
In 1942, the territory of what is now Davao Oriental was occupied by the Japanese Imperial forces.
In 1945, the Battle of Davao began with the combined forces of the British, Australian, Dutch and the Filipino troops of the 6th, 101st, 102nd, 103rd, 104th, 106th, 107th and 110th Infantry Division of the Philippine Commonwealth Army and 10th Infantry Regiment of the Philippine Constabulary being supported by Davaoeño guerrilla fighter units in attacking Japanese Imperial forces during the liberation in Eastern Davao or Eastern Davao Campaign until the end of the Second World War.
==== Foundation ====
On May 8, 1967, through Republic Act No. 4867, the province of Davao was divided into three independent provinces, one of which was Davao Oriental. Former president Ferdinand Marcos appointed Paciano Bangoy as governor and Leopoldo Lopez as vice governor on June 2.
The capital town of Mati became a component city by virtue of Republic Act No. 9408 which sought to convert the municipality into a city. The law was ratified on June 16, 2007. However, the cityhood status was lost twice in the years 2008 and 2010 after the LCP questioned the validity of the cityhood law. The cityhood status was reaffirmed after the court finalized its ruling on February 15, 2011 which declared the cityhood law constitutional.