[Or rather, this is a very futile attempt to decipher La Sofa's logic.] If one were to group "World War II" not only as the violent conflict that took place between 1939 to 1945, but included the factor of world powers in the Cold War itself - which was of course around the "world", and the Cold War being moreover an espionage war, a war of paranoia, and an arms race, then one may group it together with the previous conflict to which it tied to but developed separately. Within the Cold War included the conflicts within, i.e. the Vietnam, Korean, and Arab-Israeli wars (the latter included not in the factor of the Communist - Capitalist rivalry but it being a conflict stemmed from somewhat of a result of World War II itself). If one were to imply that the conflicts of the Cold War and the Cold War in general, being a global conflict, were technically part of World War II, then World War II would historically and logically take place in the 1960s. But this is of course through using the methods above.
I'm sure with that logic you could consider every war a part of one enourmous war that's been going on since the dawn of organic life on earth.
A collective, everlasting war that has plagued humanity since the dawn of organic life would make more logical sense if war would also refer to an extreme conflicting opinions which have been evident throughout society in general.
