sentences:  The company also bought out many small private operations in the eastern part of the Indonesian archipelago, and formed numerous joint ventures with native entrepreneurs.As international tensions increased in the late 1930s, and following the outbreak of war in Europe, the extension of Japanese interests represented by the "Nan'yō Kōhatsu" greatly concerned the British, Dutch and Australian authorities.Although Portugal and its colonies were neutral throughout the war, the Japanese interest in Timor led to the Allied invasion and occupation of Portuguese Timor in late 1941.