Hello; Here are the Top 7 Amazing Helicopters of the U.S. Military A military helicopter is a helicopter that is either specifically built or converted for use by military forces. A military helicopter's mission is a function of its design or conversion. The most common use of military helicopters is transport of troops, but transport helicopters can be modified or converted to perform other missions. Having seen a lot of Ospreys over the years, I still have never seen one flying in the plane configuration. I would rate the Apache AH-64E Guardian and the AH-1Z Viper helicopter gunships as the best of the lot. Helicopters are all engineering marvels the technology that goes into them are absolutely amazing.