The US became involved in WWII due to the Pearl Harbor attack by the Japanese.
Answer:
Kristallnacht. The third choice.
1. malaria 2. rivers had terrible waterfalls..too dangerous...until the steam engine was invented it was incredibly dangerous 3. deserts....they didn't know how to travel through the deserts and find an oasis which made it very difficult to travel through
Answer:
Muslims started invading their lands and waging wars which obviously they were not okay with
Explanation: