Google the terms "Operation Downfall," "Operation Olympic," and "Operation Coronet."
Read the casualty estimates developed by U.S. military intelligence for these invasions of Japan.
Bone up on the statistics: Japanese army strength, numbers of suicide planes and other apparatus, home-guard militias and weaponry.
Don't remember where I read it exactly, but you should have no trouble find it, but the following statistic is stunning: In the first few days of the invasion American invasion forces were expected to lose 1,000 soldiers an hour. Three hours to equal what we've lost in Iraq in three years.
Make lists...memorize them...then cut your teacher off at the knees when he spouts his nonsense at you in the classroom.
Regards, Shuckins