Ask this question again, you're going to need a more specific time the president has done this. however, if you are asking about WWI, the USS Lusitania, the Zimmerman Telegram, German U Boats targeting American ships, and so on.
Precambrian time, period of time extending from about 4.6 billion years ago (the point at which Earth began to form) to the beginning of the Cambrian Period, 541 million years ago. Precambrian time encompasses the Archean and Proterozoic eons, which are formal geologic intervals that lasted from 4 billion to about 541 million years ago, and the Hadean Eon, which is an informal interval spanning from 4.6 billion to 4 billion years ago. The Precambrian represents more than 80 percent of the total geologic record.
Answer:
Berlin
Explanation:
Following the defeat of Nazi Germany in World War II, the nation was split into 4 occupational zone, each being taken by a world/regional power, U.S.S.R, France, Great Britain, and the United States. The capitol of Germany, Berlin, was further divided into 4 zones to balance the power (though it was located deep in U.S.S.R zone), each nation taking it's respective piece.
~
