I have to regret the loss of Major-Lightfoot, twentieth Missouri, killed in the charge of the 22nd, whilst gallantly leading his men into action Major Lightfoot was a gentleman of high attainments, and a brave, gallant, and faithful officers
War of the Rebellion: Serial 037 Page 0252 Chapter XXXVI. THE SIEGE OF Vicksburg, MISS.

……………

Strange thing happen in a battle, especially one as fierce as Vicksburg. One of those is the story of Union Maj. Gustavus Lightfoot. He had been saving some especially expensive cigars for a really special occasion. Just before the battle he broke open the cigars and passed them around to his comrades saying "I won't be needing these anymore." Sure enough he was killed in the next battle.
http://americanroads.net/heritage-trail-fall07.htm

The next day the color-bearer dropped, Maj. Lightfoot picked up the colors, charging forward, exhorting the troops to follow him, falling dead shortly thereafter
Bearss, The Campaign for Vicksburg, Vol. III, pp. 843/4.