It was built and utilized by buccaneers as the primary defense of the island to prevent encroachment of Spanish forces.

All of these intelligent races had one goal in mind: to prevent human encroachment.

Throughout the 19th century the Qing dynasty was unable to prevent foreign encroachment.

Additionally, the building had little land around it to prevent encroachment.

Strategically, foreign sales are essential to strengthening global security and preventing encroachment in American spheres of influence.

However it did have a fine playing pitch newly fenced, to prevent encroachment by spectators.

In 2002, the federal and state government signed an accord to remove illegal human settlements and work to prevent further encroachment.

He suggested she should reestablish the domain's borders, to prevent encroachment and to maintain the warriors' fighting skills.

Because there was rumour of "cutting up a kid" and the college gates were closed to prevent encroachment.

But the purpose of the of the greenbelt is to prevent encroachment into the open countryside.