Answer:
It started with the "Black Ships" of 1854, when the USA forcibly opened up Japan for trade and westernization.
Explanation:
On the 1st of March 1854, Commodore Matthew Perry opened up Japan for trade by showing them his armada of steel ships which were superior to anything the Japanese had. At the time, the emperor had no real power, it was the Shogun who ruled the country. However, as the country westernized (becoming more like the western countries), Japan eventually had a government with different parties instead.
Ever since 1854, a feeling of nationalism had been growing since the Japanese were forced out of their old ways.
Also because westernization included colonialism, expansionism, capitalism, and nationalism.
Nationalism in Japan in the 19th century (1800's) was not a big problem until the 20th century. It was then that the fear of communism created more nationalistic feelings, as well as that certain movements wanted Japan to rule East Asia. This eventually led to the unintentional invasion of China by the Kwantung army that the government had lost control of, which led to the Sino-Japanese war.
Because of this war, the USA eventually brought an oil embargo on Japan, which Japan needed to continue fighting.
So the conclusion is that the nationalism of the 19th century led to Japan's attack on Pearl Harbour, and a military ruled government in Japan.
One major outcome of the Japanese military leadership's policies during the 1930's was the expansion of the Japanese Empire. The military policies led to modernizing the army, being provided with modern weaponry, and good training. That mad the Japanese army by far the most superior in the region. The Japanese knew that they can take down the other nations in the region with relative easy, and considering that they lacked natural resources, but the nations in the region had them, they decided to start and expansion. Little by little, the Japanese managed to conquer very large area in the coming years.
Well it depends on what you are talking about.
Is true cause the Asia migrate
One of tycho brahe's major contributions to astronomy was to prove that A comet was outside of Earths atmosphere.
One of tycho brahe's major contributions to astronomy was to prove that A Supernova was much farther away than the planets.
These are his two contributions