mobilized
v.v. to organize people or resources so they are ready to take action. You often hear this when a group starts working together for a specific goal or when a country prepares for war.
v. to assemble and prepare resources, personnel, or military forces for active service or a coordinated objective. Often implies a transition from a state of rest or preparation to one of active deployment.
The charity mobilized hundreds of volunteers to help after the storm.
The community mobilized quickly to protest the new development, collecting thousands of signatures in just one weekend.
Historians often debate how effectively the government mobilized the nation's industrial capacity during the early stages of the conflict, noting significant delays in factory conversions.
The verb is transitive when referring to organizing others, but can be used intransitively when a group organizes itself.