Friday, July 3, 1863, Chapter 4, Armistead What concerns Armistead about this battle?Short answer question. You don't need to go in depth.
One thing that is troubling Armistead prior to the battle is his old friend, Union General Hancock, whom he will soon face on the battlefield. He considers the possiblilty of crossing the lines to say a word to his old friend, but chooses not to. Armistead is haunted by the feeling that he will die soon, and around him, there appears to be foreshadowing that perhaps many others will as well. Armistead gives his wedding ring to General Pickett, and asks that Pickett send it to his (Armistead's) girlfriend (the ring had been given to him by his late wife, who Armistead is thinking of this day). Another ominous sign: when Armistead and Pickett ride into the woods to get orders from Longstreet, Longstreet is crying. Additionally, Dick Garnett, although injured, has chosen to defy orders and ride his horse into this battle, fully expecting to die as he will be a visible and easily accessible target. Garnett wants to die honorably and has decided this is how to do it. So there is generally a foreboding feeling as the battle commence, although had the South won, they likely would've been able to march straight to Washington and claim victory.