What did the big three have a disagreement about at yalta?

At the Yalta Conference in February 1945, the "Big Three" – Franklin D. Roosevelt, Winston Churchill, and Joseph Stalin – disagreed primarily over the future of Eastern Europe, particularly Poland. Stalin sought to establish a sphere of influence in the region, advocating for a pro-Soviet government in Poland, while Churchill and Roosevelt pushed for free elections and democratic governance. This disagreement highlighted the differing ideologies and post-war ambitions of the Allies, setting the stage for tensions that would later escalate during the Cold War.