He 'emerges' into various periods throughout history, many times assisting the locals in defending themselves from outside threats.

In order to defend from unknown threats beyond known space, a security company creates highly advanced robotic soldiers to patrol the border.

It spends resources defending the profession of sleep technology from legislative threats.

We will continue to defend our borders from external threats.

Defensive purism: Aims at defending a language from external threats.

He rose to prominence defending the northeastern border from the Khitan and other northern threats.

The military has historically played a professional, apolitical role in defending the country from external threats.

The agencies defend the UK from threats to our national security and to the lives of British citizens.

Battra was created by Earth's life force to defend the planet from various threats, such as meteorites and human destruction of the environment.

The nurseryman believes that plants are responsible, as they can release chemicals to defend themselves from threats.