U.S military spend huge amount of money in Mech Soldier R&D, using exoskeleton or wearable robot.
Exoskeletons allow soldiers to lift hundreds of pounds, pushing the boundaries of what humans can do. Designed around the function and shape of the human body, these devices can be a simple as a headset and gloves or as complex as a full suit of armor. In recent years, wearable robots have gotten smaller and more flexible - transforming into an extension of the human.
In 2000, Defense Advanced Research Projects Agency (DARPA) of the U.S. Department of Defense began a seven-year, $75 million program called Exoskeletons for human Performance Augmentation. The agency provide funding to robotic firm Sarcos to develop a powered exoskeleton for sodiers. DARPA accepted a Sarcos exoskeleton design in 2006 an the firm began building prototype.