At the siege of Masada, a group of heavily outnumbered Jewish soldiers elected to commit suicide en masse, rather than to be captured by the besieging Romans, who would probably have committed them to a tortuous death by crucifixion. Such an action is highly unusual, almost unique in the annals of history.
During the Spartacus slave revolt, some 6,000 rebels were captured and crucified. Why did they choose this over death in battle? (As rebelling slaves, they were outlaws, not foreign prisoners who could expect to be allowed to live.) And why might this be true of others in similar straits (e.g. partisans captured by Nazis in World War II)?