US policy during most of World War I
Mallore

At the end of World War II, the Allied nation that captured the German capital city of Berlin was the Soviet Union.

Explanation:

The Battle of Berlin was the last major offensive of the European theater of World War II, during which the Soviet Union's Red Army attacked the capital of Third Reich, desperately defended by groups of Wehrmacht soldiers. The Soviets, in clear numerical superiority and of terrestrial and air means, succeeded, under the command of Marshal Georgij Zukov and Marshal Ivan Konev, to carry out their mission, to destroy or capture the bulk of the enemy forces and to obtain the surrender of Berlin in May 2, 1945.  The Third Reich officially surrendered on May 8, six days after the end of the battle.