No longer the world's policeman? The United States after Afghanistan withdrawal

On Tuesday, the US president marked the departure of the final troops from Afghanistan with a speech in which he insisted that foreign military intervention can solely be in cases of vital national security threats. What does that mean for other theatres of operation, like South Korea, the Sahel in Africa and all points where the world's largest army is deployed? Does the end of forever wars also mean the end of the US acting as the world's policeman?

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