It's quite a coup to find something really new to say about the much-studied American Civil War. Lisa Brady found it by holding an environmental lens to history.
In Brady's War Upon the Land, southern landscapes are main actors, not just backdrops, in the theater of the Civil War.
Water and mud - not rebel forces - Brady says, posed the greatest challenges to Union troops as they waded unfamiliar bayous and mosquito-infested swamps. The muck constantly bogged down the wheeled artillery and supply wagons in marches through Mississippi, Georgia and the Carolinas.
Generals Grant and Sherman naively overestimated the ability of their engineering-trained officers to manipulate nature to their advantage. They twice tried and failed to divert the Mississippi River away from the Confederate stronghold of Vicksburg.
Much of the Civil War history focuses on the bloody battles - and rightly so. More than 620,000 soldiers and uncounted numbers of civilians died in the conflict, the deadliest in U.S history. Brady, an environmental historian at Boise State University, spotlights massive destruction of another kind.
The Union troops moved en masse - tens of thousands of soldiers. And they were under orders to consume or destroy as much cropland and livestock as they could along the way, like a plague of locusts. Brady quotes a Savannah plantation owners saying, "Young pigs were hunted down as though they were the rebels themselves."
General Sheridan accounted for everything his men appropriated or destroyed in the Shenandoah Valley. They burned 1,200 barns, took or killed 4,000 horses or mules, 10,918 beef cattle, 12,000 sheep, 15,000 hogs - the list goes on.
War Upon the Land isn't a narrative page-turner. It's a well-written piece of scholarship. As the war dragged on, Brady argues, the Union increasingly aimed to topple the Confederacy by destroying its agricultural foundation.
She makes a strong case. In his memoirs, Sherman defended his scorched earth strategy in the Shenandoah Valley, saying, "The reduction to poverty brings prayers for peace more surely and more quickly than does the destruction of human life."
The book also is a window on American attitudes toward nature at the time. Undeveloped landscapes were wastelands. Nature was to something to be conquered, not to behold.
Conservation became a vaunted idea after the Civil War. Some of the generals actually hand in the creation of the first national parks. Sherman and Grant are memorialized in Sequoia-Kings Canyon national parks. They fought so hard to dominant the landscape. Perhaps it's fitting that their namesake trees are two of the largest living things on Earth.