>

My comment was more that a variety could make defense harder.
I don't know anything around military either.  Apparently infantry is a key to tank success and been the problem for Russia.
From what I can tell.  A platoon = 4 tanks, company is 3 platoons with 2 spares/HQ (14 tanks and why this number is offered I guess?), battalion is 4 companies with 2 HQ (58).  Next is brigade and divisions.  Not sure where regiments fit or what mix of units are.
The sooner Ukraine receive the tanks it requested the better.  The personnel manning the tanks will get crash course to master their new tool to fight Russians. >

Saw the Challenger 2 tanks need a 6 week training course (including support).  Wonder how long it is with the leopard 2 also when they started training on them.
The mix of tanks will be interesting for tactics. >

I have zero knowledge about military things or tactics other than wiki stuff but I'm assuming they'd hope to be able to form a new tank battalion if not brigade. And/or they could mix the "diesel" tanks (Challenger 2 and Leopard 2) with T-72s and T-64s while the Abrams with the T-80s in existing formations.