..but at least partly a military brotherhood, yes. And in most ancient cultures,rape and enslavement could be the result of sacking a city (as we know from the oldTestament!).

In this case Horatius calls for two volunteers to join him in holding a narrow gate and protect the city, sacrificing their lives in the process. Had to do with a renegade who sold them out to the Etruscans named Sextus, son of a former King. He had also, in fact committed a crime by raping a Roman woman named Lucretia. Thus the whole ‘nobody has any honor these days’ tone of the poem.