Japanese archipelago or the Japan Sea
I would say that the US and the Soviet Union at the end of WWII withdrew their troops as soon as a demilitarized zone was created. Also, I am sure they would require a peace treaty to be signed with Germany before withdrawing troops.
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mabe so they needed to conserve space so that they can make the most money with the land that they have?
Ridge push is a process in which the unlifted ridge is thought to push the oceanic plate towards the subduction zone. Slab pull is a process where by the weight of a subducting plate help to pull the trailing lithosphere into subduction zone. Ridge lush is cause by the potential energy gradient from the high topography. Slab pull is caused by negative buoyancy of the subducting plate.
