Suicide is a casualty of war.
In the civil war of Corcyra the tide turns and one faction prevails. Many surrender and are summarily executed. Others are tried, then executed.
Thucydides reports: “Seeing what was happening, most of the other suppliants, who had refused to be tried, killed each other in the temple; some hanged themselves on the trees, others found various other means of committing suicide.”
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Thucydides, History of the Peloponnesian War 3.81