There have been a number of non-lethal, or direct energy systems, developed. In most cases their use has been limited due perhaps to a large extent, uncertainty about possible long term damage it might cause to the recipients. ‘Cooked’ rioters is hardly good press.
There has been suspicion that some states who have less compunction about this, have been using them for a while. US diplomats posted to China and Cuba reported experiencing severe headaches, vertigo, memory loss, dizziness and other problems, since the beginning of 2016 and it is strongly suspected that they had been subject to laser weapons attack.
www.nytimes.com
Reports have intimated that Russian agents were using a top-secret laser weapon to try and inflict brain damage on American spies and diplomats across the globe. In the 70s, Soviets had directed microwaves at the US Embassy in Moscow. Various studies were made.
foreignpolicy.com
China has been developing these and apparently China’s Type 055’s are equipped with a ship-borne high-power microwave (HPM) anti-missile system, which combines microwave weapons with close-in guns and air defence missiles forming an integrated anti-missile system.
It is now being reported that Chinese troops have been using these types of weapons against Indian troops along the borders that recently saw violent clashes and troops on both sides killed in hand to hand combat without the use of guns.
eurasiantimes.com
Chinese media outlets reported the PLA’s “innovative use of microwave weapons” to force the Indian army to retreat, saying it could have been for the first time such weapons were used in open conflict.
To the Chinese, cooked Indian soldiers, after the last debacle, might be welcome news.
There has been suspicion that some states who have less compunction about this, have been using them for a while. US diplomats posted to China and Cuba reported experiencing severe headaches, vertigo, memory loss, dizziness and other problems, since the beginning of 2016 and it is strongly suspected that they had been subject to laser weapons attack.

Microwave Weapons Are Prime Suspect in Ills of U.S. Embassy Workers (Published 2018)
Doctors and scientists say microwave strikes may have caused sonic delusions and very real brain damage among embassy staff and family members.
Reports have intimated that Russian agents were using a top-secret laser weapon to try and inflict brain damage on American spies and diplomats across the globe. In the 70s, Soviets had directed microwaves at the US Embassy in Moscow. Various studies were made.

The Secret History of Diplomats and Invisible Weapons
The alleged use of a “sound weapon” against U.S. Embassy officials in Cuba harks back to a Cold War medical mystery.

China has been developing these and apparently China’s Type 055’s are equipped with a ship-borne high-power microwave (HPM) anti-missile system, which combines microwave weapons with close-in guns and air defence missiles forming an integrated anti-missile system.
It is now being reported that Chinese troops have been using these types of weapons against Indian troops along the borders that recently saw violent clashes and troops on both sides killed in hand to hand combat without the use of guns.

Chinese PLA Troops Used 'Laser Weapons' Against Indian Soldiers In Ladakh - Chinese Expert: WATCH
The Deputy Dean of the School of International Relations of the Renmin University of China, Jin Canrong, made a startling claim in a TV program telecasted on November 11, saying the Chinese PLA soldiers had used directed energy weapons (laser weapons) against Indian soldiers during the...

Chinese media outlets reported the PLA’s “innovative use of microwave weapons” to force the Indian army to retreat, saying it could have been for the first time such weapons were used in open conflict.
To the Chinese, cooked Indian soldiers, after the last debacle, might be welcome news.