The story of the Centauro II began in 2011, when the Italian Army signed a contract with the CIO consortium (Iveco Defense Vehicles and Leonardo) for the development of a replacement for the B1 Centauro, which at the time was obsolete.
We have to keep in mind that in recent times the most hostile country on Brazil's borders has been Venezuela. With the country's current "president" Nicolas Maduro saying that they would knock out Brazil and Colombia's teeth in the event of war. 
In the mid-1970s, the Type 74 was put into active service in Japan, but at the same time the Soviet Union was operating T-64 and T-72 tanks that had been put into service years earlier, Japan at the time did not have any vehicles of its stature at the time. 
It recently became public knowledge that the EB (Brazilian army) will hold a public consultation from August 1st to November 1st, this has to do with the search for a new MBT and IFV to replace the more than 200 Leopard 1A5s and some M113s that we use as IFVs
In the 90's the Japanese saw the need for a more modern vehicle to replace the Type 74 as a lighter tank capable of being moved wherever the JSDF needed it, unlike the type 90 which had a more limited area of operation due to its weight
(interviewer) You can start by introducing yourself and talking about which vehicles you were in and what your role was in them.
I would like to make it very clear at the beginning that I am not the owner of the truth and that any correction in case of error will be welcome, such as the addition of information, This makes X a better platform for interaction, information sharing and debate.
On January 19, United States President Joe Biden announced a new military aid package for Ukraine that Among many things, it included 59 IFVs M2A2 Bradleys, one of the vehicles that would become one of the most famous of the war. 
On January 25th, the same day that the re-export of the Polish Leopard 2A4s were authorized by Germany, the President of the United States Joe Biden announced the shipment of 31 M1 Abrams to Ukraine, enough to equip a battalion. 
The first country to announce the shipment of the Leopard 2A4 to Ukraine was Poland, which requested permission to re-export the vehicles on January 24th and was granted the following day, Initially 4 vehicles were sent to Ukraine but Poland sent 10 additional vehicles later, After that, Canada, Spain and Norway also sent Leopard 2A4s to Ukraine.
First of all: the last version of the T-80 to come off the production lines was the T-80U so I will put my money on that, although another version may be the one chosen for production.
Well, the vehicle is not good for modern warfare and several things are missing from it but I even understand why the Russians haven't added so much equipment to the vehicle since you needed to correct the Russian deficiency of not having enough vehicles equipped with thermal vision systems and as you need to upgrade many vehicles all of this would be very expensive, But they could have tried harder. In reality, thinking more about money than quality was a stupid decision that help to led to several cases like the one in the image below
in Afghanistan, the USA realized that Humvees, even with structural reinforcements and additional armor, did not provide sufficient protection against IEDs. to solve this problem, the Americans began to use new MRAP-type vehicles, vehicles such as the maxxpro were adopted but they were very large vehicles and despite having excellent protection they were heavy and not very mobile, this led to low mobility in the mountainous terrain of Afghanistan, so in 2008 The Americans began to study another type of more mobile MRAPs
I will not go too deep into the history of the vehicle since the focus of this thread would be Ukraine but talking a little about it, the was made by Vickers with a first prototype getting ready in 1988, the vehicle came to pass tests that compared it with the M1A2 and leopard 2 in 1991.
I would like to start with a big NO tank battles/encounters are not rare, videos showing battles between tanks are rare (I'm going to say battles because it's easier) 
The Russians started the battle in Avdiivka by throwing several soldiers, vehicles, drones, etc. at the Ukrainians and suffered heavy casualties, but as it was a very large force, the Ukrainians ended up Saturated, which gave room for some advances. 
Imagine the scene, you send your BMP-1 to assault a position full of experienced soldiers along with the crew and they all die, either because they passed through a mine or were hit by an ATGM, Very bad, right? You lost experienced people, now what? 
as the vehicle is a modification of the leopard 2A5 came armed with the same gun, the L/44 also used in the STRV 121 (leo2A4) but received the modification of the recoil system and can easily receive the L/55 
We can start by showing the main points 
First of all: same fire control system as the leopard 2.
In 1955 the M42 Duster entered service with the German Army, under the name "Flakpanzer M42 Duster“. Germany integrated 500 M42 Duster vehicles into the Bundeswehr. 