This map originates from an educational map used by the History Department of the United States Military Academy. It was digitised and edited by a Wikimedia Commons user. Emok and, finally, translated into Spanish by Rowan Windwhistler.
The illustration shows the situation of the major imperial powers in the Pacific on 1 September 1939, when World War II broke out in Europe. The colours represent the different powers, and each colony is marked with the year in which they established their power:
- France: Purple
- United Kingdom: Yellow
- Japan: Red
- Netherlands: Orange
- Portugal: Green
- United States: Blue


