Singapore for economic, educational and social reasons. Most of those who came to Singapore before the War had received their primary education in the Batak and Malay language. Some came to Singapore to continue their education in the private and Christian schools. For example, the Seventh-day Adventist organisation had students' amenities in Singapore in 1915 and they encouraged the Bataks from Sipirok, Angkola and Pematang Siantar in Sumatra to send their children to continue their studies in Singapore. An English education was prized as it was seen as a passport to getting a white-collar job in the plantations in Eastern Sumatra that were owned by the Dutch and the Americans. After receiving their education in Singapore, the Bataks would return to their homeland. Some would marry and bring their wives to Singapore. The Batak Christians were the first Bataks to bring their wives to Singapore. Most of the Bataks who came before World War 2 worked as gardeners, peons and manual labourers. During the Japanese Occupation, the Bataks were conscripted as foot soldiers or forced labourers by the Japanese. Some were sent to Singapore for military training. After the War, many of the Bataks returned home. At the same time, many others came to Singapore from places like Medan, Palembang and the Riau Islands. Some managed to find work as clerks, storekeepers and some started businesses with non-Bataks partners. Some also joined the British army as soldiers, technicians and electricians. Others started identifying themselves as Malays so that they could join the military or get jobs given to local Malays. In 1947, the Bataks in Singapore formed a welfare organisation called Saroha ("one heart" in the Batak language). The aim of the organisation was to help the Bataks in Singapore. The organisation lasted until 1954 and was disbanded due to leadership problems and a lack of support from its members. Attempts to revive it later in 1958 proved futile. There were Bataks who took Malay wives and converted to Islam. The majority of them and their descendants were assimilated into the Malay community and preferred to be known as Malays. Ethnic composition of Malay population 1931–1990 The following figures show the composition of the various Malay ethnic population in Singapore for the past 60 years. The great increase shown in the other Malay groups, especially the Javanese, in 1990 is likely due to the increase in the employment of Indonesian