There are a few interpretations of who this speaker might be:
* A soldier: The speaker could be one of the soldiers involved in the incident, reflecting on their actions and the aftermath.
* A witness: The speaker could be someone who witnessed the events, either directly or through the media, and is deeply affected by what happened.
* A person reflecting on the event: The speaker could be a more general representation of society, reflecting on the tragedy of the event and the broader issues it raises about prejudice, discrimination, and the military.
Ultimately, the poem allows the reader to interpret who the speaker is and how their perspective shapes the narrative.