Final answer:
General Ulysses S. Grant led a war of attrition against the Confederacy, relying on the Union's superior numbers to relentlessly attack and wear down Confederate forces.
Step-by-step explanation:
The Union general known for fighting a war of attrition against the Confederacy and having little concern for his own losses was General Ulysses S. Grant. Grant understood the Union's numerical superiority and implemented a strategy to relentlessly attack Confederate forces. He aimed to deplete their resources, which could not be readily replenished due to the South's smaller population compared to the North. Under Grant's leadership, the Union army sought to destroy General Robert E. Lee's army in Virginia during 1864. Grant's determination and aggressive strategy played a pivotal role in the eventual surrender of the Confederate forces at Appomattox Court House on April 9, 1865.