It means that the speech said might be forgotten but the soldiers actions will be remember.
They oppose or point out problems with another person's argument
Ultranationalists increased due to japan securing favorable treaties Sounds right. And from what I looked up it makes sense.
But, I just want you to know, I am not 100% sure.
Answer:
He would seek enlightenment through meditation.
One day Buddha was sitting under the Bodhi tree and became deeply absorbed in meditation, and then he found it, his enlightenment.
