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.
For the best answers, search on this site https://shorturl.im/0UZs7. POG-People Other than Grunts is a derogatory military term that Infantry Soldiers/Marines (aka grunt) use to refer to military personnel who are not infantry/grunt. Personally, I find your brother to be pathetic for using that term on you; especially, for a person that is fresh out of boot.