Aguinaldo. And for a brief period between 1899 and 1900, Tanay served as the capital of the then Morong Province after Philippine–American War broke out and the American forces invaded the lake towns and captured Antipolo. In 1900–1901, Tanay as was under the Government appointed by the American Military under Taft Commission. From 1903 to 1934 the town leadership was under the American rule then in 1934 Tanay was under the Commonwealth of the Philippines as the Tydings–McDuffie Act was approved on March 24, 1934, until the Philippines fell to the hands of the Japanese during the Second World War in 1942. In 1942–1945 the Mountains of Tanay served as the Guerrilla base for 'Marking's Fil-American Guerrillas, beginning the Liberation of Tanay in March 1945 a very decorated by the Filipino soldiers of the 4th and 42nd Division of the Philippine Commonwealth Army, 4th Constabulary Regiment of the Philippine Constabulary and the recognized guerrillas against the Japanese occupation forces during World War II. General Agustin Marking is buried in a private cemetery by the road overlooking his son's farm in Sampaloc. On June 19, 1959, Republic Act No. 2336, also known as "An Act Establishing a Summer Resort in Sampaloc, Municipality of Tanay, Province of Rizal" was approved whereas there is hereby established a summer resort in Sampaloc. The Commission on Parks and Wildlife shall issue such rules and regulations for the establishment of such resort is taken place. In October 2003, deposed Philippine president Joseph Estrada was transferred to a rest home in Sampaloc, a mountain barangay. He remained under house arrest until he was given executive clemency by President Gloria Macapagal Arroyo. During the Typhoon Ketsana (Ondoy) on September 26, 2009, Tanay was one of the hardest hit towns due to the rising of Laguna Lake and the flooding of Tanay River. Geography Barangays Tanay is politically subdivided into 20 barangays (10 urban, 10 rural). Climate Demographics In the 2020 census, the population of Tanay, Rizal, was 139,420 people, with a density of . The majority of the population consists of Tagalogs who live near Laguna de Bay, though there is also a significant percentage of mountain-dwelling people living in the northern portions of the municipality. The town's major trades consist of fishing, agriculture and regional commerce. The roots of the Sambalic languages can be traced back to Tanay, where the etymologically similar Sinuana or Remontado Dumagat is