His research has focused on ancient warfare and especially the Roman military.

But such early efforts had little practical effect on warfare.

Later on aerial warfare in all forms used by both sides.

Still we carry on warfare with them-but it is hit and run fighting at best.

The weather can have effects on more than just agriculture and warfare.

"As you say, I am not an expert on warfare."

During the 1970s he wrote a number of books on tanks and armoured warfare.

Many major powers continue to focus their military programs on conventional warfare.

The Devil has carried on very effective warfare all during his imprisonment.

What he really wanted to do was write a book on modern warfare.