Answer: Way back then, the Roman Empire was the largest empire in the world.
Explanation: Is that good?
If you're talking about WW2, it's the battle of Stalingrad.
If it's about WW1, it would probably be Verdun.
From my Knowledge,
If the head of the executive branch e.g. (The President) were subjected to a subpoena, then they have the right to claim executive privilege to withhold information from the other branches.
on july 30, 1619 in Jamestown Virginia the first elected legislative assembly in the New World–the House of Burgesses–convenes in the choir of the town’s church.
Go back to the old ways, restore monarchs power.