The open door policy impacts lasted for decades and they have three major impacts; increase Chinese backlash against foreigners. Chinese and American conflict with Japan. Increased US interest in East Asia
I believe the answer is Observations.
Mayan civilizations made architectural designs to use time and days.
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Answer:
"As Allied forces approached Nazi camps, the SS organized “death marches” (forced evacuations) of concentration camp inmates, in part to keep large numbers of concentration camp prisoners from falling into Allied hands." encyclopedia.org
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