 DB Schenker, the third-largest logistics provider in the world by revenue and a division of the national railway company of Germany, has agreed to acquire truckload carrier USA Truck in an all-stock transaction as it seeks to accelerate its penetration of the U.S. domestic market, the companies announced Friday. The international supply chain manager said it will pay 31.72 per share in cash for all of USA Trucks NASDAQ: USAK common stock. 