Look at that border!
YES YOU Can.!
Immigration was largely controlled by border ruffians with little oversight
President Trump has promised to build a wall on the US-Mexico border.
Set your fence boundary at least five feet inside of your neighbor's border.
If the bandits evade capture the will cross the border into Canada.
A immigrant tried to pass the U.S border patrol.
An officer of the Border Patrol will inspect your cargo.
The University of Wisconsin is in Madison. Wisconsin shares a border with Canada.
In order to safeguard the UK, border control must be carried out rigorously.
A tariff is an import or export tax. We had to pay a tariff when we crossed the border with our purchases.
The sentence should be: You crossed the Cambodian border. In that instance, Cambodian would be the adjective, as it is describing the noun which is border.