Tripartite Pact Signed in Berlin

“On September 27, 1940, Japan, whose sympathies lay with Germany and Italy, signed a ten-year pact with these two countries. This provided for mutual aid in the event of any of the signatories being attacked by a power not so far involved in the war, and was interpreted as a warning to the United States. The picture above shows: left to right, seated, Ciano (Italy), Ribbentrop (Germany), and Saburo Kuruso (Japanese Ambassador to Germany) signing agreement.”

Source: Pictorial History of the Second World War