The heavy destruction of berlin, which occurred largely in the spring of 1945, was done mainly by:

E It was done mainly by the soviet union
The destruction occurred during the Battle of Berlin,  It was designated the Berlin Strategic Offensive Operation by the Soviet Union. scholars compound it as the ultimate demise of Berlin which culminated in the death of Hitler. The soviet red forces won the battle amidst wanton destruction of the city.

Japan was expansionist, imperialist and mostly run by the military.

In Germany, we see the rise of the Nazi Party, which gained its first minister in 1930.

Soviet Union was a huge communist country. Which means that everything in the country belonged to the government.

In Spain, Primo de Rivera was forced to resign in 1930 and the King, Alfonso XIII, called for elections to be held in a democratic fashion, opening a way to the Second Republic