https://www.zerohedge.com/military/us-navy-tests-iron-man-jetpacks
The suit can run on jet fuel, diesel, or kerosene. Users can travel as fast as 80 mph and reach an altitude of 12,000 feet. However, both pilots in the video performed maneuvers at lower heights for safety purposes.
In the near future, jetpacks will likely be deployed with special forces units on the modern battlefield. The Brits are already flying theirs around.