Southern Operation

Japanese history

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July 14, 2026

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The "Southern Operation" was a crucial part of Japan's strategy during World War II, particularly in the Pacific theater. Following the outbreak of war in Europe in 1939, Japan found itself bogged down in a protracted conflict in China. The success of German victories in Europe in 1940 emboldened Japan to pursue further territorial expansion in Southeast Asia and the Pacific to secure vital resources like rubber and petroleum.1

The Southern Operation was designed to achieve this by launching coordinated attacks from existing bases. The plan involved two main drives: one through the Philippines from Formosa, and another through Malaya from Indochina and Hainan Island. The ultimate goal was to converge on the Dutch East Indies, capture Java, and establish a fortified defensive perimeter across the western Pacific and Southeast Asia. This strategy aimed to make Japan economically self-sufficient and the dominant power in the region, believing that a strong defense would eventually lead to a negotiated peace.1

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Burma Railway
Early Japanese conquests
…as part of the so-called Southern Operation. By late spring 1942, with the surrender of Allied strongholds in Singapore, Hong Kong, the Philippines, and the Dutch East Indies, an estimated 140,000 Allied prisoners of war had fallen into Japanese hands. In addition, approximately 130,000 civilians—including some 40,000 children—were captured by…
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…as part of the so-called Southern Operation. By late spring 1942, with the surrender of Allied strongholds in Singapore, Hong Kong, the Philippines, and the Dutch East Indies, an estimated 140,000 Allied prisoners of war had fallen into Japanese hands. In addition, approximately 130,000 civilians—including some 40,000 children—were captured by…
Read More

World War II
Japanese policy, 1939–41
…the army in the “Southern Operation”: 11 infantry divisions and seven tank regiments, assisted by 795 combat planes, were to undertake two drives, one from Formosa through the Philippines, the other from French Indochina and Hainan Island through Malaya, so as to converge on the Dutch East Indies, with…
Read More
…the army in the “Southern Operation”: 11 infantry divisions and seven tank regiments, assisted by 795 combat planes, were to undertake two drives, one from Formosa through the Philippines, the other from French Indochina and Hainan Island through Malaya, so as to converge on the Dutch East Indies, with…
Read More