Answer and Explanation:
The main idea of the text is to show how Japanese forces have been violent in military attacks and invasions of foreign territories, that is, the text reinforces the idea that Japan is acting in a violent way is dangerous and must be stopped before it's too late too much and before more lives are lost. The structure of the text manages to convey this message clearly and efficiently, as it enumerates and sequences the attitudes that Japan has taken, strengthening the argument about the dangers that this country is imposing.
It is important to note that although Japan did, in fact, act aggressively during the second civil war, this type of behavior is expected in countries that are at war, but we cannot forget that Japan was attacking and invading territories of countries that are not were involved with the issues of World War II.