I don't think time matters in this instance.
We're fighting a country that has trouble mustering anything above AK-47's.
Their tanks are from the 60's and 70's.
We already own their airspace.
There's no reason we couldn't achieve any military objective in that country at any time we want.
But you're right. We haven't built the coalition that we had before.
Which is why this is a POLITICAL issue and not a MILITARY issue.
And when you send troops in on political issues, our people get killed.