Complex sentence: The Speenhamland system was an amendment to the old Poor Law or Elizabethan Poor Law, created as an indirect result of Britain's involvements in the French Wars (1793-1815).
Split into simpler sentences: The Speenhamland system is concerned to be an amendment to the old Poor Law or Elizabethan Poor Law. The creation of the system came about because of Britain's involvements in the French Wars (1793-1815).