The M84 was a Cold War era Yugoslav development of the Soviet T-72, upgraded with ‘western’ style sighting system and wind sensor. The prominent wind sensor on the front-top of the turret is the giveaway identifier.
NATO video of M84 during wargame Combined Resolve, Hohenfels, Germany, September 2020:
Army National Guard photo by Sergeant Megan V. Zander, 29JAN2020.
Slovenian M84A4s in Hohenfels, Germany, January 2020. They were acting as Opposition Forces (OpFor) for NATO wargames Combined Resolve-13.
Army National Guard photo by Sergeant Megan V. Zander, 29JAN2020.
U.S. Army photo by Massimo Bovo.
Slovenian M84A4s during NATO wargames Adriatic Strike at Pocek Range in Postonja, June 2017.
USA photo by Graigg Faggionato.
U.S. Army video by Massimo Bovo, M84 live fire, June 2017:
USA photo by Graigg Faggionato.
Video report, U.S. Army explains why they like using former Warsaw Pact (Slovenia, being a part of Yugoslavia, was never part of Warsaw Pact), or other Soviet bloc countries, in wargames:
USA photo by Sergeant Alexandra Hulett.
Hohenfels, Germany, June 2016.
USA photo by Sergeant Alexandra Hulett.
Installing the Multiple Integrated Laser Engagement Systems (MILES) for wargames. The MILES is essentially the world’s first laser-tag system, it is used on both people and vehicles.
USA photo by Sergeant Alexandra Hulett.
USA photo by Sergeant Alexandra Hulett.
The bracket strapped to the gun tube is for the charges that simulate the gun firing. The amber light on the turret is the wound-damage/kill light, it flashes temporarily if you are ‘damaged-wounded’ and flashes constantly if you are ‘killed’.
California Army National Guard photo by Sergeant Brianne Roudebush, 21JAN2016.
NATO Exercise Allied Spirit-4, Hohenfels, Germany, January 2016.
California Army National Guard photo by Sergeant Brianne Roudebush, 21JAN2016.
Video report, Slovenian tanker explains why they are working with U.S. Army (USA), November 2015:
USA photo by Specialist Shardesia Washington.
M84s on Hohenfels, October 2015.
USA photo by Davide Dalla Massara.
Adriatic Strike exercise at Pocek Range in Postonja, Slovenia, June 2015.
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Skeletons of vehicles waiting to be completed as factory workers told to ‘go home’!
Once busy freeways of Wuhan, Hubei Province, China. 14-million people suddenly ‘disappeared’ by atheist government lockdown!
In Mumbai, India, even the Hindi gods are powerless against the newcomer called CoViD-19! Siddhivinayak Temple now devoid of devotees.
In the town of Nara, Japan, deer are taking over now that humans have disappeared!
Skopje, Macedonia, only stray dogs occupy the capital city’s streets.
In Saudi Arabia, Allah’s Mercy not able to stop Mecca from being nearly shutdown. Pics are before and after coronavirus.
A deer in Sri Lanka, it’s not unusual for deer to be seen in what I suspect is the town of Trincomalee, what is unusual is that all the shops are shuttered and no human can be seen due to CoViD-19 lockdown.
Sign on a building in the near empty city of Cape Town, South Africa.
Wrath of God? Catholic Pope gives mass to an empty Vatican, 
The once busy international Blue Water Bridge in Port Huron, connecting U.S. state of Michigan with Canada, no traffic. Border checkpoints restricted due to the implementation of Title 42 USC 265.
The lights are still on, but very few people are out-n-about in The Big Apple of New York City, U.S.A.
U.S. Air Force (USAF) CoViD-19 screenings at Ramstein Medical Clinic, Ramstein Air Base, 19MAR2020.
U.S. Army medics prep for another day of CoViD-19, Hohenfels, 18MAR2020.
Employees of the Miesau Army Depot Child Development Center disenfect the now shuttered daycare center, 20MAR2020.
Employees of the U.S. Army Garrison Rheinland-Pfalz S6 (computer geeks) report being swamped with requests for laptops after U.S. Army personnel were ordered to ‘telework’.
Despite Italy being hit hard by CoViD-19, infrastructure work must still be done. USAF civil engineers replace a fire hydrant at Aviano Air Base, 23MAR2020.
Commander Fleet Activities Yokosuka (CFAY) Security Department conducts CoVid-19 checks at the gate, 25MAR2020. 
Vending machines on Misawa Air Base get disinfected, 24MAR2020.
U.S. Army Soldier on Camp Carroll has the fit of his respirator tested during CoViD-19 response training, 24MAR2020.
Going into battle?
This is how the U.S. Army mops floors in CoViD infected Korea.
Using CBRNE vehicle decontamination procedures to deal with CoViD-19.
Central Arkansas Veterans Healthcare System is actively screening for CoViD-19 (just to be clear, the VA is separate from the Department of Defense).
Drive-thru meds delivery at Luke Air Force Base, 23MAR2020.
CoViD-19 testing is not painless, Luke AFB, 23MAR2020.
After loading up with CoViD-19 ammo, the USNS Mercy finally sailed out of San Diego on its CoViD-19 mission, 23MAR2020.
CoViD-19 screening aboard USS Bonhomme Richard (LHD 6).
U.S. Army Corps of Engineers Sacramento District employee inspects a facility in Santa Clara, 23MAR2020, as potential use for Alternate Care Facility (ACF, aka quarantine/isolation camp). The order to search for potential CoViD ‘camps’ came from FEMA (Federal Emergency Management Agency).
After a Marine on Marine Corps Air Station Miramar tested positive for CoVid-19, the post office was disinfected and marked-off for proper social distancing, 23MAR2020.
U.S. Army Corps of Engineers (USACE) technical survey team confer with a U.S. Public Health Service officer about the potential of using the Hawaii Convention Center as a FEMA ordered Alternate Care Facility (ACF, aka quarantine/isolation camp).
Marine Corps Base Hawaii’s Kaneohe Bay Branch Health Clinic implements CoViD-19 protections.
U.S. Army Corps of Engineers Chicago District have been actively assessing potential sites for Alternate Care Facility (ACF, aka quarantine/isolation camp).
CoVid-19 screenings outside the Keesler Medical Center at Keesler Air Force Base, 23MAR2020.
Marines returning from overseas now undergoing CoViD-19 screening at Marine Corps Air Station Cherry Point.
Volunteers on Grand Forks Air Force Base with free food for grade school students now unable to go to school due to CoViD-19 shutdowns.
Tobyhanna Army Depot employee performs maintenance on a much needed ventilator.
Maintenance on an infusion pump.
Airmen working the Ross Clinic’s pharmacy, on Goodfellow Air Force Base, using Personal Protective Equipment (PPE). So far no cases of CoViD infection on the base.
Goodfellow AFB has also switched to curb-side pharmacy ops only.
New recruits arriving at Lackland AFB for basic training have a new lesson to learn; social distancing.
U.S. and Colombian militaries joined with silly-vilian organizations to conduct the Exercise Vita humanitarian response training.
U.S. Air Force 51st Aerospace Medicine Squadron updates its CoViD-19 map, 04MAR2020, Osan Air Base. (CoViD-19=CoronaVirus Disease 2019)
USN SeaBees build ‘environmental enclosures’ at Marine Corps Air Station Iwakuni, the enclosures are meant to provide people with a place to shelter from sudden “hostile weather conditions”. The project began in October 2019 and is still ongoing.
Thai health inspectors check arriving U.S. military personnel for signs of CoViD-19 (CoronaVirus Disease 2019), 24FEB2020.