[georgyo]

No, it is not.

We have no way to know if the other general recieved the message, we can only know that the block chain has committed it.

This is the same as a forum or a blog post. We can make a post, but we don't know if the our other party read it.

If the "enemy" army cut off internet access to one general after it responds to attack, even if a message is committed into a block chain, only one general is attacking at first light.