The three rules known for unifying Japan are Oda Nobunaga, Toyotomi Hideyoshi, and Tokugawa Ieyasu.
Yes the tax remained on tea
Advantages:
Natural barriers
Powerful empire
Protection from enemies
Resources
Disadvantages:
Living in tall mountain range
Elevation sickness
Traveling is dangerous
Harappan seals have shown connections to the Mesopotamian civilization. The seals date between 1872-73 CE. The structure of the seals are similar to that of the Mesopotamian civilization and provide evidence for the trade existing between the two civilizations.
There have been a lot of historical events that are important to American citizens. One thing you could write about is suffrage, the right gained for women to vote. Obviously, that is important to American citizens because now women are allowed to vote.