rally

A public gathering or mass meeting that is not mainly a protest and is organized to inspire enthusiasm for a cause.

"a campaign rally"

A protest or demonstration for or against something, but often with speeches and often without marching, especially in North America.

"a political rally"

A sequence of strokes between serving and scoring a point.

To collect, and reduce to order, as troops dispersed or thrown into confusion; to gather again; to reunite.

To come into orderly arrangement; to renew order, or united effort, as troops scattered or put to flight; to assemble; to unite.

To collect one's vital powers or forces; to regain health or consciousness; to recuperate.