During the American Civil War, both the Union and Confederate armies tried to keep the size of their wagon trains in check to improve the tactical mobility of their forces. This was measured as a ratio of the number of wagons per soldiers, with the idealized number according to Napoleon being of 12.5 wagons per 1,000 soldiers. In general, the Confederates managed a lower ratio compared to Union forces, although this was borne out of necessity instead of choice, with Union trains decreasing in size with every subsequent campaign. Ulysses S. Grant typically allowed only 19 wagons for every 1,000 soldiers, while Stonewall Jackson managed just 7 wagons per 1,000 soldiers during his Shenandoah campaign.