Muster (military)
WordNet
noun
(1) Compulsory military service
(2) A gathering of military personnel for duty
"He was thrown in the brig for missing muster"
verb
(3) Call to duty, military service, jury duty, etc.
(4) Gather or bring together
"Muster the courage to do something"
"She rallied her intellect"
"Summon all your courage"