What was going on in the US during battle of puebla?

The United States was in the midst of the Civil War during the Battle of Puebla. The war began in 1861 when several southern states seceded from the Union and formed the Confederate States of America. The Union, led by President Abraham Lincoln, fought to preserve the Union and defeat the Confederacy. The Civil War was one of the deadliest wars in American history, with over 600,000 soldiers killed. The war ended in 1865 with the victory of the Union.