The team needs a list.
The leader defines the list.
The list is everything that needs to be done from now until the team reaches their goals.
It starts off big with chunky milestones and then breaks it down into more manageable activities until it becomes tasks that the team can work on and understand the point where their effort, their contributions, contribute to and become something bigger than they could accomplish on their own.
But first, it starts with a list, of what must be done, to succeed.