Page "Democratic peace theory" Paragraph 39

In international crises that include the threat or use of military force, one study finds that if the parties are democracies, then relative military strength has no effect on who wins.

This is different from when nondemocracies are involved.

These results are the same also if the conflicting parties are formal allies.

Similarly, a study of the behavior of states that joined ongoing militarized disputes reports that power is important only to autocracies: democracies do not seem to base their alignment on the power of the sides in the dispute.