“When goods don't cross borders, armies will.”
“When goods do not cross borders, soldiers will.”
“When your army has crossed the border, you should burn your boats and bridges, in order to make it clear to everybody that you have no hankering after home.”
“A conquering army on the border will not be stopped by eloquence.”
“A safe army is better than a safe border”
“When I was crossing the border into Canada, they asked if I had any firearms with me. I said, "Well, what do you need?”