The Battle of Vinegar Hill took place on June 21, 1798, during the Irish Rebellion against British rule. It was a significant conflict between the United Irishmen, who sought independence, and British forces. The battle occurred near Vinegar Hill in County Wexford, where the rebels aimed to establish control over the area. Despite initial successes, the United Irishmen were ultimately defeated by the better-equipped British troops. The battle resulted in heavy casualties for the rebels and marked a turning point in the rebellion, leading to increased repression by British authorities in Ireland.