Possible Indian troubles was about the only condition that kept large trains together for mutual protection.

Edward plays the tyrant king to great effect, and the students bond together for mutual protection.

Hence they settled always in groups of several families each, all banded together for mutual protection.

And the soldiers began to crawl toward each other for mutual protection.

When it becomes clear that the vanished are not coming back, the survivors arrange themselves into new social groups for mutual protection.

That is the real law of life: mutual protection.

In the first instance the city was a tribal place, an area where the tribe banded together for mutual protection.

So the seven ships were a convoy, sailing together for mutual protection.

The members of the League agreed to provide 10,000 infantry and 2,000 cavalry for their mutual protection.

These players join together for mutual protection and guidance.