Question

read the excerpt from the dark game: true spy stories from invisible ink to cia moles. yet, by the time robert e. lee surrendered to ulysses grant at appomattox, virginia, some four years later, about 620,000 soldiers had died on the battlefields, more than american battle deaths in all other wars from the revolution through the vietnam war. what is the authors primary purpose for including this detail? to inform readers about the differences between three military conflicts to persuade readers of the seriousness of the american civil war to entertain readers with tales from behind the lines of battle to encourage readers to visit battlegrounds in appomattox, virginia

Explanation:

The excerpt emphasizes the high death - toll in the American Civil War compared to other wars. It aims to show the seriousness of the Civil War. It doesn't compare three military conflicts, entertain with behind - the - lines tales, or encourage visits to Appomattox.

Answer:

to persuade readers of the seriousness of the American Civil War