It's important to realize that some effective tactics for creating a denied area do not require a significant continuing commitment of personnel or additional material.

These tactics require the same methods of data storage and retrieval as secret questions.

This tactic requires going out in the rain a lot, because water protects him from their sight.

Such a tactic requires extreme fitness and co-ordination of the entire team.

His tactics required a close-in approach in which he felt the lower calibre weapons had a more devastating effect.

The push-over tactic requires voters to be able to reliably predict how others will vote.

The Americans applied that tactic as if conservatism required less determination.

Use any means, any tactics, any force of arms required.

They have always been willing to use such means if tactics required.

These tactics required fighting in tight formation with good military discipline and control.