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The United States Treasury Department produced this map of trade routes crossing the Pacific Ocean between the United States and Asia. Each route is labelled with the names of its ports, and with the distance between them in miles.

This map highlights the colonisation of Southeast Asia, showing French Indochina (green), British Burma and Malaya (orange), the Dutch East Indies (pink), and the Spanish Philippines (green). In the region, only Siam (yellow) is independent.