I know it sounds like Delegation is Management 101, and perhaps for some managers it is.
However if you wish to have an accountability and lead impact that is much bigger and broader, you need to negotiate commitment.
Delegation is taking "your" work or accountability, breaking it into pieces and passing it out to members of your team.
Negotiating commitment requires you to lay out a clear purpose and mission for the team, understand your strengths and the unique strengths of each member of your team and then negotiate their individual commitment to their part of the mission.
With delegation there is follow up, and monitoring to see if tasks are complete. With Negotiated Commitment, each member takes on ownership of that commitment and asks for support if and when they need it. and you as a leader hold them accountable to deliver on their commitment and challenge them and respond accordingly if they don't.
Negotiating commitment requires courage and trust, however has a significant "flywheel" affect of engaging may more perspectives and energy in accomplishing the mission, then controlling and monitoring delegated tasks.