what was the source of conflict between japan and china from 1931 to 1945
It was initiated by the 1931 invasion of Manchuria by Japan, but you should look into the background around this time. It is often referred to as the "Sino-Japanese War or conflict" so you may want to google this.
umm hi sir.....im doing my exit project and it is on the battle of gettysburg. I still don't get it after reading so much....who attacked first/who threathend who first. Who where the main commanders and who won the battle?