Because it helped natives retain their lands and is now a cornerstone of native american land protection laws now
Answer:
1. The Chinese Communist Party and Chinese Nationals worked together as the First United Front.
2. Chinese Nationalsists purged the Chinese Communist Party from their organization, known as the White Terror.
3. The Chinese Communist Party and Chinese Nationalists worked togerhter to deal with the growing threat of Japan.
4. The Chinese Communist Party and Chinese Nationalists wage a civil war against each other.
Explanation:
The answer is “protect the United States from terrorist attacks .”
B. and D.
I believe, but I am not 100% sure!