The Society for Creative Anachronism (SCA) is a medieval reenactment group with an international membership, founded in California in 1966. Members of the group participate, to a greater or lesser extent, in a wide variety of activities based on those found in pre-1601 CE cultures. The vast majority of interests in the SCA are either combat-focused, or focused on the day-to-day crafts of the period, known within the Society as A&S (Arts & Sciences). Gatherings of the SCA are events, at which attempts at pre-17th century costume must be worn, and practices or meetings, at which costuming is largely up to each member's discretion—although sufficient safety equipment must always be worn for practicing combat skills.