Question

the great powers believed they had the right to send armies into countries with revolutions in order to keep order. this is known as what? principle of principals principle of legitimacy principle of intervention principle of pleasure

Explanation:

The Principle of Intervention refers to the idea that great powers can intervene in other countries' affairs, especially during revolutions, to maintain order. The Principle of Legitimacy focuses on restoring legitimate monarchs. The Principle of Pleasure is not a relevant historical principle here. "Principle of Principals" is a misnomer.

Answer:

Principle of Intervention