The peak in 1945 would correlate to what international issue?

It would be on how to handle and manage the world after the Second World War. After the war the allied powers were divided on how the world would look after and it resulted into conflicts and struggles and even resulted a Cold War between the two world's superpower which is the US and the USSR.

“destroyers for bases agreement in the destroyers for bases agreement between the united states and the united kingdom on september 2, 1940, fifty caldwell , wickes, and clemson class us navy destroyers were transferred to the toyalbnavy from the united states navy in exchange for land rights on british possessions.” i hope this you .