What do you think about "friendly fire" incidents? Should troops who kill friendly forces face discipline? If so, what should the penalties be?

There is already a procedure in place to investigate friendly fire incidents. If the incident meets criminal standards (negligent, intentional, etc), then a court-martial is held to try the case. Criminal penalties are applied in the case of a conviction.

It's war, man. War is machine gun fast and chaotic. Bad things happen in war. It's just the nature of the game. Those who are need to be prosecuted, usually are.

A review would make more sense than discipline.
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The most likely cause of friendly fire isn't the guy with the gun (missiles, etc.) but most likely the people who told him where to go and which direction the enemy would be coming from.

I would guess in most cases it's bad and sad luck. Orders get messed up or someone stands when they shouldn't kind of thing.

In such cases I doubt there's much to gain by even telling the shooter.

Higher level analysis should be conducted to try and learn from it, of course. And if negligence can be found then perhaps some discipline - but even so - the fog of war makes that a tough call.

And obviously, intent would make it murder so I'm not considering that in this reply.

+5

I think it's punishment enough to kill a fellow soldier

Too many different circumstances. What if they were given bad co-ordinates? What if those hit were where they had explicit orders not to be? What if recognition signals were fouled up? Too many things can go wrong in the "fog of war". In some cases, yes, they should be disciplined; in others not. No generalisations are possible.

These things that happen are very unfortunate, but these things do happen, all these incidents need to be looked into, (which i am pretty sure they do).
The discipline should be decided on exactly what happend, did someone disobey a order, were they ordered to do something and it resulted in friendly's killed, its all up to the situation on what should be done.

I think they are unfortunate, but ultimately unavoidable. No disciplinary action should be taken unless someone who was there can offer proof to the contrary, that it was no accident. +5

Do you really think they know as it's happening,no penalties ,it's war.

Shut happens. I think no discipline action should be taken

Yes, but not as much as those who kill innocent people. Assuming they get disciplined at all.

Friendly fire is almost always accidental. Misidentification, bad visibility, bad communications, bad intelligence. It must always be investigated and the root cause found. Not all cases merit disciplinary action. +3

you did that you would half the american fighting forces :P
the amount of friendlies they've killed...

not much is actually known on the subject of what repercussion there are after such an incident, i think ppl should be better informed

It depends on the situation of the killing.

I think the military deals with this quite well. They thoroughly investigate those instances.