 British intelligence reports during the occupation noted significant removals of any materials that could be used in the war effort.Next to Sutan Sjahrir who led the student (Pemuda) underground, the only prominent opposition politician was leftist Amir Sjarifuddin who was given 25,000 guilders by the Dutch in early 1942 to organize an underground resistance through his Marxist and nationalist connections.The Japanese arrested Amir in 1943, and he only escaped execution following intervention from Sukarno, whose popularity in Indonesia and hence the importance to the war effort was recognized by the Japanese.