Brutus has calmed himself after a turbulent time and he is fully awake when the ghost manifests. The dying flame of his lamp announces the ghost's presence.
A soldier is one who fights as part of a land-based army. A soldier can be an enlisted person, a non-commissioned officer, or an officer in the army.
soldier of fortune (plural soldiers of fortune) 1  A non-commissioned soldier willing to serve any state or person who will hire him; a mercenary. ( 2 figuratively) Hence, a person willing to work for or ally himself with any person or institution who will take him on.