New arrivals rushed to cross the frontier before the barrier was finished.
Times, Sunday Times
It felt strange, in the age of aircraft and cars, to cross a frontier by riverboat.
Times, Sunday Times
About a million people a day legally cross the frontier for trade, commerce or recreation.
Times, Sunday Times
The faience was hidden in kegs and hay to cross the frontier.
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He vowed to attack them if they crossed the frontier.
Times, Sunday Times