Answer:
They had never seen these diseases so their immune system couldn't handle them. So, lots of people died and the population went down.
The Soviet Union did this because they wanted to rebuild and expand their country after massive destruction and loss of life during the war. Essentially this aggressive expansion and annexing of these countries made the world realize that the Soviets were a massive threat to the world even though they were allies during WWII. I hope this helps :)
Do you have further context for this question
Temas is part of a African tribe, he needs to fight a lion as a tradition in order to be accepted into the tribe as a man
