The act of entering the war and the preceding events resulted in a deep political and social division in post–World War I Greece. The country's foremost political formations, the Venizelist Liberals and the Royalists, already involved in a long and bitter rivalry over pre-war politics, reached a state of outright hatred towards each other. Both parties viewed the other's actions during the First World War as politically illegitimate and treasonous. This enmity inevitably spread throughout Greek society, creating a deep rift that contributed decisively to the failed Asia Minor campaign and resulted in much social unrest in the inter war years.