We got a little of that in the US, post-Vietnam. We didn't lose, didn't get a Treaty of Versailles forced on us... we just didn't win. And we always win (1812 having been banished from the national memory long ago). It took the better part of a decade to get over that - maybe two, if you figure it ended when we rolled over Iraq (and didn't stick around and try to occupy it, which is what got us in trouble the second time).