The plow is the invention that increased crop yields and made soil more porous.
The answer would be diseases! For ever 3 that died in battle, 5 died to disease!
March of 1932. The Japanese invasion of Manchuria began on 19 September 1931, when the Kwantung Army of the Empire of Japan invaded Manchuria immediately following the Mukden Incident. After the war, the Japanese established the puppet state of Manchukuo. Their occupation lasted until the Soviet Union and Mongolia launched the Manchurian Strategic Offensive Operation in 1945.
Both C and D were both male rulers, so we can rule them out.
Next comes Hatshepsut and Cleopatra.
Cleopatra was a co-regent. Even though she was a very strong person of history, Hatshepsut takes the answer.
Hatshepsut ruled for a whopping 20 years, making her considered one of the most successful female Egyptian rulers.
Hope this helps!
