I don't have the time or patience to go through all of these, but the second one is one that really pisses me off. The US-Soviet diplomatic relationship (and frankly most diplomatic relationships) was based on handshake deals and trusting each others word. There was no formal deal granting NATO passage across East Germany to access West Berlin, for instance. So when the US told the Soviets that they wouldn't expand West, the Soviets had historical reasons to think that didn't need to be written down, because that was business as usual. Not that a written agreement would have been worth anything anyways, as the value of the promise of a NATO liberal is equivalent to that of a used car salesman.
I don't have the time or patience to go through all of these, but the second one is one that really pisses me off. The US-Soviet diplomatic relationship (and frankly most diplomatic relationships) was based on handshake deals and trusting each others word. There was no formal deal granting NATO passage across East Germany to access West Berlin, for instance. So when the US told the Soviets that they wouldn't expand West, the Soviets had historical reasons to think that didn't need to be written down, because that was business as usual. Not that a written agreement would have been worth anything anyways, as the value of the promise of a NATO liberal is equivalent to that of a used car salesman.