Final answer:
The euphemism 'armed intervention' means that the ruler responded with war.
Step-by-step explanation:
The euphemism "armed intervention" in the context of the ruler's response to the threat suggests that the ruler chose to respond with war. The term "armed intervention" is a way of softening the harsh reality of the ruler's decision to use military force against the threat. It is a substitute phrase that downplays the aggression involved in the ruler's response.
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