regarding challenger II loss
https://www.theguardian.com/world/20...-footage-shows
Western sources indicated on Tuesday night that the tank first struck a Russian mine on Monday, which blew a rear fuel compartment, causing it to be immobilised. The crew then evacuated safely, but as it lay dormant it was then hit by a Lancet drone.
This is something that's going to have to be SOP for future militaries -- either recover tanks ASAP or have SHORAD units covering the battlefield to prevent recoverable vehicles from being converted into losses by enemy UAVs.