What country was hit hardest during World War 1?

During World War I, the country hit hardest in terms of casualties and destruction was France. The war's Western Front saw extensive trench warfare, leading to significant loss of life and widespread devastation of French towns and infrastructure. France suffered approximately 1.4 million military deaths and millions more wounded, alongside economic hardships that had lasting impacts on the nation. The psychological and social toll on the French population was profound, shaping the country's post-war landscape.