When Russia entered WW1, they had mobilized about 1.5 million soldiers. At most, the Russians had 5 million soldiers fighting. They couldn't arm all of these soldiers though, because they only had about 4.6 million weapons.
Answer:
Two other similarities between these three civilizations is the use of a calendar, which they used to predict eclipses, schedule religious ceremonies, and determine when to plant/harvest crops, and go off to war, (more so the Mayas and the Aztecs), and they all had some form of writing system.
Answer: The holocaust began by Hitler stripping German Jews of citizenship.
Explanation: On 15 September 1935, The German Parliament passed the Nuremberg Laws. These laws stated that only those of "German or kindred blood" could be citizens. Everyone else was stripped away of their citizenship.