Final answer:
The Grand Alliance faced issues regarding territory division post-war, leading to occupation zones and resulting in political influence competition among Allies, setting the stage for Cold War tensions.
Step-by-step explanation:
One issue that the Grand Alliance faced at the end of World War II was the division of territory, which led to zones of occupation and contentious competition for political influence among the former Allies. As the war concluded, the armed forces of the Allies occupied various regions across Europe, resulting in a complex patchwork of control. The Soviet Union, United States, United Kingdom, and France each oversaw their respective zones within Germany and across Europe. This arrangement created opportunities for each power to exert influence, but also laid the groundwork for the Cold War tensions as differing political ideologies and national interests came into direct conflict within these occupied zones.
While the shared goal of defeating the Axis powers unified the Grand Alliance during the war, the post-war period highlighted different visions for Europe's future, with the Soviet Union pushing for a communist sphere of influence, and the Western Allies advocating for democratic governments and market economies. The eventual result was a divided Germany and a Europe split into Eastern and Western blocs, each under the sway of a superpower.