The only news source I could find was Fox News: Biden authorizes military to use up to 3,000 reserve troops to augment US forces in Europe

The order comes on the heels of the president’s five-day trip to Europe, which wound through the U.K., Lithuania and Finland. The trip was meant to demonstrate the force of the international coalition against Russia’s invasion of Ukraine. And Biden appeared confident he had accomplished that mission, proclaiming that he and other NATO leaders showed the military alliance “more united than ever.”