Spanish East Indies together with the Spanish West Indies, were administered through the Viceroyalty of New Spain based in Mexico City. After Mexican independence, they were ruled directly from Madrid. As a result of the Spanish–American War in 1898, the Philippines and Guam were occupied by the United States while about 6,000 of the remaining smaller islands were sold to Germany in the German–Spanish Treaty of 1899. The few remaining islands were ceded to the United States when the Treaty of Washington was ratified in 1901. Spanish contact began on , when a Spanish expedition led by Ferdinand Magellan reached the Mariana Islands.
Netherlands East Indies Forces Intelligence Service for censoring the mail of Royal Netherlands Navy and Royal Netherlands East Indies Army (KNIL) personnel. It also checked whether the spouses of Dutch troops in Australia presented a security risk. It was not involved in carrying out secret intelligence operations. That was the task of the Inter-Allied Services Department (ISD), which was set up in April 1942 on the instructions of US General Douglas MacArthur, and was responsible for sending out agents to commit sabotage and gather intelligence in occupied areas. Two Dutch officers were assigned to the Dutch East Indies section, which, like NEFIS, was based in Melbourne.