Even then, they had pretty detailed plans worked out for many, many scenarios. It doesn't mean they weren't co-existing well or that anyone thought it was likel

Even then, they had pretty detailed plans worked out for many, many scenarios. It doesn't mean they weren't co-existing well or that anyone thought it was likely. Making a plan is so inexpensive compared to the cost of responding to some event without a well-laid-plan, that having a plan is hardly what I would call regarding them as a potential enemy.