There are numerous mountains in Japan and they were an obstacle towards unifying the country. Since many parts of Japan waged wars against others, it was difficult to fight in other people's regions since they had the mountains to their advantage so there was a difficulty in uniting every part of Japan through wars, like it was done in numerous other countries.
The Kansas-Nebraska Act infuriated many in the North who considered the Missouri Compromise to be a long-standing binding agreement. In the pro-slavery South it was strongly supported.
Answer:
so that they can have an test flight and help make there invetion better
Explanation: