America's Modern Wars - Understanding Iraq, Afghanistan and Vietnam, Christopher A. Lawrence.

A largely statistical analysis of post-war counterinsurgency warfare, looking to see if there are any patterns that might help explain the outcome of insurgencies. Provides some thought provoking data, suggesting that high force ratios are key, as long as the insurgency doesn't get too big, and also goes some way to disproving other ideas. Not great on the human element of these conflicts, but still a very valuable study of the sort of conflicts that look to dominate in the future
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