During the Spanish colonization, the province was sparsely populated. The continued raiding of Moro slaves discouraged the province from growing and developing. However, in the 19th century immigrants from adjacent provinces like Bohol and Cebu populated the area. In 1942, Ruperto Kangleon held a conference in the town of Sogod, when the first meeting attempt in Malitbog, a town to the east, failed due to many leaders staying away. He was trying to unify all guerrillas helping the Philippine Commonwealth troops during World War II. From 1944 to 1945, the Allied Philippine Commonwealth Army soldiers and Filipino guerrillas attacked the Japanese Imperial forces in an effort to liberate Southern Leyte, and American troops landed on Leyte on October 20, 1944. Due to a change of sovereign powers, all the offices in Maasin except the Fiscal's Office were abolished and reverted to Tacloban, the capital of Leyte. This created a major problem because of the dearth of transportation, the difficulty in managing the affairs of government in Tacloban and the language barrier between the Cebuano-speaking South-westerners and the Waray Easterners. The difficulty of managing the entire island from the main city suggested a need to separate the island into two provinces. At first there was a general movement for a "Western Leyte" and soon after, many prominent men and leaders rallied behind the movement. Six attempts to pass a law for the division of Leyte were made. On the sixth attempt, then Congressman Nicanor Yñiguez introduced into the House a division law similar in substance to that of the "Kangleon Bill", but recognizing the impossibility of creating an East-West Division, he instead opted to make his own district a province. Abandoning the first bill, Congressman Nicanor Yñiguez presented "House Bill No. 1318" proposing a new province of Southern Leyte comprising Third Congressional District of Leyte to include sixteen municipalities, from Maasin to Silago in the mainland, and in the Panaon Island. The bill became "Republic Act 2227" otherwise known as an "Act Creating the Province of Southern Leyte" and was signed into Law by President Carlos P. Garcia on May 22, 1959. On July 1, 1960, Southern Leyte was inaugurated as a province with sixteen municipalities and Maasin as the capital town. Thus, the third District of Leyte became the "Province of Southern Leyte" and the Lone District of Southern Leyte.