During the 1930's, Japan was constantly on the move and used its superior military and tactics in order to invade new territories. The leaders of the country were well aware that in order for them to become a very strong nation they needed resources, and they did not had them on their own soil. Because of this, the Japanese started to provoke, or to create scenarios through which they would excuse their actions. Little by little they started to invade, capturing part of Sakhalin, Manchuria, as well as the majority of the eastern coast of China and its bets ports, Korea, and Taiwan. Japan became an empire through its actions, and it didn't stopped in the 1930's, but it actually continued to invade new territories in the coming years.