Victor Davis Hanson: American soldiers leave Germany -- and suddenly Germany is upset.

President Trump recently ordered a 12,000-troop reduction in American military personnel stationed in Germany. That leaves about 24,000 American soldiers still in the country.

A little more than half of the troops being withdrawn will return home. The rest will be redeployed to other NATO member nations such as Belgium, Italy, and perhaps Baltic and Eastern European countries.

German Chancellor Angela Merkel is said to be furious. She claims the redeployments will “weaken the (NATO) alliance.” German commercial interests chimed in that the troop withdrawals will hurt their decades-old businesses serving U.S. bases.

Perhaps, but Merkel surely cannot be surprised. Six years ago, all NATO members pledged to spend 2 percent of their GDP on defense. Yet only eight of 29 so far have kept their word.

Germany spends only about 1.4 percent of its GDP on defense. As NATO’s largest, wealthiest and most powerful European member, it sets the example for the rest of alliance.