Corned beef has a long history originating in medieval Europe of preserving beef with salt. It became particularly associated with Ireland, where the beef-curing industry in Cork was a major export business in the 18th-19th centuries. In America, corned beef was popular due to its preservation qualities and was a staple food for colonial and military diets. Though commonly eaten on St. Patrick's Day today, corned beef was not a traditional Irish food but more of a festive dish sometimes enjoyed on holidays. Jewish delis also served corned beef which has origins in Eastern European culinary traditions of preserving meat.