Did the USSR, Great Britain and the US agree on all of their strategies? What were major agreements or disagreements?Mostly curious about the...

To some extent, there was agreement over strategy.  The US
and the British, for example, created the Atlantic Charter, in which they agreed to
concentrate first on defeating Germany, and only later on fighting
Japan.

This is not to say that there was complete
agreement.  For example, the USSR was displeased with the Western Allies over the issue
of a western front.  The Russians felt that the British and Americans were allowing them
to soak up all the German attacks without doing much of anything to help.  They wanted
the Western Allies to invade Europe before the British and Americans were at all
ready.

In addition, there were some disputes between the US
and Britain as to where American troops should go into battle, where invasions should be
mounted, and other such smaller aspects of strategy.