the Sahara desert on the outskirts
YES! it was used to keep away unwanted visitors and invading armies
Invading Armies, get Nappin!
Army of Jericho.
a Spanish colonial general who fought Napoleon's invading armies
WW2 began with Hitler's armies invading Poland.
The king's invading armies were huge oppressors in the captured countries.
The First Battle of the Marne.
Invading Armies
No, it was to keep out invading armies from the north.
The soldiers where only loyal to Rome when paid
The soldiers where only loyal to Rome when paid
The answer is the North European Plain.