You need a time period to be entered here because the Maximum Land area
(million Km to the power of 2) list the British Empire as 35.5 to the power of 3, while the Soviets only have a 22 or so. According to this information, the British Empire is larger in land mass than the Soviet Union. Again, we need a time period for an accurate answer.
The primary characteristic of a feudal society is the exchange of land for services.
The overlord will grant the vassal a land in exchange for the vassal's services. Services like fighting beside the lord in terms of war. Vassals have their own men and since the vassal is at the service of the overlord, his men is also at the service of the overlord.
A canon? im not sure though
In 1863, General Edmund Kirby Smith took command of the Confederate Trans-Mississippi Department, and unsuccessfully tried to relieve the siege of Vicksburg by Lt. Gen. Ulysses S. Grant on the opposite eastern banks of the Mississippi River in the state of Mississippi.