I want to know the answer to the following question:
What document was signed in 1899?
All the background I'm provided with is that "After the German–Spanish Treaty of 1899, in which Germany acquired the Carolines, Palau, and the Marianas from Spain, Germany placed all of its Micronesian islands, including the Marshalls, under the governor of German New Guinea.". Is that enough to answer the question?
Answer: yes