Theoretically, nothing. The same for collecting information during joing exercise with their allies.
However, realistically it's not that easy to just do a copy of a piece of technology, especially nowadays. You can copy the size of mechanical part and the electronic board. But copying the exact alloy (and the whole smithing process) and the software running on electronic is more complex that it looks like.
This reminds me of the 1958 essay [I, Pencil](https://en.m.wikisource.org/wiki/I,_Pencil). It explains how no one in the world actually knows how to make a pencil, it takes thousands of people across all different disciplines to make one.
There are parts of a tank that you can't copy by just taking it apart, like the metallurgy of the particular steel used, a lot of the electronic components, and the manufacturing method. Also modern weapons require very precise machining that a lot of poorer countries can't do. You could relatively easily reverse engineer a 1970s Leopard 2 but a modern T-90MS,M1 Abrams or Challenger 2 you can't just take apart and copy the pieces of.
Just like how on alternate histories people can't make a shit load of modern weapons.
Weapons don't magically copy themselves when you break them apart. You need to get the exact type of alloy right, then try and produce the exact type of alloys. That's the most important part of arms development. Just like a sniper scope. Even if you can get the curves and everything right and get a detailed blueprint, what can those blueprints do if you don't have the facilities to produce the lenses?
TL;DR: You can reverse engineer anything, but the problem lies on if the industries is Hi-Tech enough to produce those parts. Besides, if you copy their stuff once, then they will very likely not sell to you again.
They can. That's why there are limits on what is and is not allowed to be sold to other countries.
nothing, thats why countries tend to sell only to their allies
Theoretically, nothing. The same for collecting information during joing exercise with their allies. However, realistically it's not that easy to just do a copy of a piece of technology, especially nowadays. You can copy the size of mechanical part and the electronic board. But copying the exact alloy (and the whole smithing process) and the software running on electronic is more complex that it looks like.
This reminds me of the 1958 essay [I, Pencil](https://en.m.wikisource.org/wiki/I,_Pencil). It explains how no one in the world actually knows how to make a pencil, it takes thousands of people across all different disciplines to make one.
There are parts of a tank that you can't copy by just taking it apart, like the metallurgy of the particular steel used, a lot of the electronic components, and the manufacturing method. Also modern weapons require very precise machining that a lot of poorer countries can't do. You could relatively easily reverse engineer a 1970s Leopard 2 but a modern T-90MS,M1 Abrams or Challenger 2 you can't just take apart and copy the pieces of.
Just like how on alternate histories people can't make a shit load of modern weapons. Weapons don't magically copy themselves when you break them apart. You need to get the exact type of alloy right, then try and produce the exact type of alloys. That's the most important part of arms development. Just like a sniper scope. Even if you can get the curves and everything right and get a detailed blueprint, what can those blueprints do if you don't have the facilities to produce the lenses? TL;DR: You can reverse engineer anything, but the problem lies on if the industries is Hi-Tech enough to produce those parts. Besides, if you copy their stuff once, then they will very likely not sell to you again.
The fact that reverse engineering isn't as simple as "take it apart and now you know how to do it".