allies and axis
The forces are balanced when the sum of two opposing forces is zero.
dualism
the names of the two opposing forces were the allies and the axis. The axis was Germany, Italy, and japan. The allies were the united states, great Britain, France and the soviet union.
Nothing
Inertia and force
Allies - United States, France, Great Britain, Soviet Union, et al.Axis - Nazi Germany, Imperial Japan
battle
conflict
conflict
In WWI, it was Central Powers, and Allied Forces. In WWII, it was the Nazis and Allied Forces
The two opposing forces in a book are the protagonist and the antagonist.