The island of Guam is located at 13° 28' 0"N, 144° 46' 59" E
The answer is Annam Highlands
They increased their sizes to rejuvenate the land. Before the war, everyone left their farms to go to the war. And once the war was over, the farms increased in size due to the high demand of resources needed to recover from the war.
Answer:
I would go for diseases.
Note that I might be wrong! Always double check your answer! :)
Stay safe and Merry Christmas!