Complex sentence: When the medal was first established, a new one was issued for each action; in 1813 an order was created, instructing that only one medal be worn, and instituting the use of clasps for each successive award.
Split into simpler sentences: When the medal was first established, a new one was issued for each action. In 1813 an order was created, instructing that only one medal be worn, and instituting the use of clasps for each successive award.