How did the Irish potato famine of the 1840s and mass emigrations affect the social conditions in eastern U.S. cities?

Suddenly, in the mid-1840s, the size and nature of Irish immigration changed drastically. The potato blight which destroyed the staple of the Irish diet produced famine. Even before the famine, these people had been desparately poor, proverbially the poorest in Europe.

In Japanese culture it was unacceptable to lose and losing a war was disgraceful. With this fact, Emperor Hirohito probably committed suicide.