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
The king's invading armies were huge oppressors in the captured countries.
WW2 began with Hitler's armies invading Poland.
No, it was to keep out invading armies from the north.
The First Battle of the Marne.
Invading Armies
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.