"Battle Hymn of the Republic" is a song written by Julia Ward Howe in 1861 during the American Civil War. It was inspired by the Union army's march and reflects the moral fervor of the time, emphasizing themes of justice and righteousness. The song's powerful lyrics convey a sense of purpose and determination in the fight against slavery. The hymn has become an enduring anthem, often associated with American patriotism and social justice movements. Its memorable melody, originally based on the song "John Brown's Body," has made it a staple in various cultural and religious contexts, symbolizing hope and resilience.