In the latest installment of his "Science and War" digital history column, Scott Hippensteel examines geology's role in the endurance of "witness" trees on Civil War battlefields. Read it here: tinyurl.com/3x7d9s3k

In the latest episode of our "Civil War Breakthroughs" podcast, historian Judith Giesberg discusses the impact the United States Sanitary Commission had in its efforts to support healthy practices in the Union army. Sponsored by @SUVCW. Listen here: tinyurl.com/5n6v6r9m

"Mercy in Disaster: Abby Hopper Gibbons’s Journals and Letters from Four Years of Civil War Nursing," ed. by Angela G. Schear, shows how "female nurses operated in an environment that was foreign and sometimes inhospitable to them," writes Brittany Gregory.tinyurl.com/4ey537y7

In the wake of the violent military draft protests that gripped New York in July 1863, the Philadelphia-based newspaper The North American highlighted a different—and “sometimes amusing”—kind of draft resistance occurring in that city. Read it here: tinyurl.com/yvtepk7v

Robert E. Lee died #otd in 1870 at his home on the campus of Washington College in Lexington, Virginia, where he served as college president. The former commander of the Army of Northern Virginia had suffered a massive stroke two weeks earlier. He was 63.

In the latest episode of our "Civil War Breakthroughs" podcast, historian Jane Schultz discusses the motivations and experiences of the women who volunteered as nurses during the Civil War. Sponsored by @SUVCW. Listen here: tinyurl.com/bdth8wsf

"This Great Contest Afloat: The Civil War on the Seas, Coastline, Rivers, and Oceans" by Neil P. Chatelain "will whet the curiosity of the reader—and hopefully inspire more work on the war’s naval theater," writes Melissa Kenfield. Read more here: tinyurl.com/5y3jttf4

In the latest installment of his "Tales From The Road" digital column, John Banks spends a day with Gettysburg icon Dean Shultz, the "Keeper of Lost Avenue." Read it here: tinyurl.com/7ttndph8

The Second Battle of Corinth—a Union victory—concluded #otd in 1862. Confederate forces suffered heavy losses in their assaults on the Union defenses that ringed the city, especially Battery Robinett, where the fighting was hand-to-hand.

The first day of the Second Battle of Corinth, fought #otd in 1862, saw Earl Van Dorn's Confederates drive William Rosecrans' Federals back to the inner line of defenses surrounding the critical rail junction in MS. The fighting stopped at nightfall, to be resumed the next day.

In the Season 2 premiere of our podcast "Civil War Breakthroughs," historian Lindsay Rae Smith Privette discusses the wartime evolution in military surgeons’ training, knowledge, and practices. Sponsored by @SUVCW. Listen here: tinyurl.com/499xd4fp

In "A Terrible Intimacy," Melvin Patrick Ely "bring[s] to life a tangle of relationships that linked slaveholders, ordinary whites, free Blacks, and enslaved Blacks" in Prince Edward County, VA, writes Daniel W. Crofts. Read more here: tinyurl.com/3n5shdu6 @HenryHolt

Union general William "Bull" Nelson was shot and killed in Louisville's Galt House Hotel #otd in 1862 by fellow general Jefferson C. Davis, who was enraged after being publicly insulted by Nelson, his commanding officer. Within two weeks, Davis returned to duty unpunished.

John Heckman—the "Tattooed Historian"—offers his thoughts on the Canadian War Museum's new exhibit, "Close to Conflict," which explores the ways in which the American Civil War affected Canada. Read it here: tinyurl.com/4j7bjxjr

Our "Civil War Breakthroughs" podcast returns next week with a second season, The Medical Renaissance, in which historians examine how modern medicine took root during the war. You can listen to the series’ trailer here: tinyurl.com/278t7rjp

"A Mother’s Work: Mary Bickerdyke, Civil War Era Nurse" by Megan VanGorder "will be an important addition to scholarly conversations on women’s history and the history of medicine and nursing," writes Sarah Handley-Cousins. Read more here: tinyurl.com/bdh6v49z

Abraham Lincoln issued the preliminary Emancipation Proclamation #otd in 1862, declaring that if the Confederates did not end the fighting and rejoin the Union by January 1, 1863, all slaves in the rebellious states would be free.

In 1862, Union army assistant surgeon James Calhoun wrote about a recent incident in which a soldier was thought to have been wounded by the “wind” of a passing projectile. Calhoun remained skeptical of the possibility. Read his thoughts here: tinyurl.com/2t7jjua5