Complex sentence: Although a Non-Intervention Committee was formed, its policies accomplished little, and its directives were rendered ineffective by the policies of appeasement practised by European states; the official Spanish government of Juan Negrín was gradually abandoned within the organization during this period.
Split into simpler sentences: Although a Non-Intervention Committee was formed, its policies accomplished little, and its directives were ineffective. The official Spanish government of Juan Negrín was gradually abandoned within the organization during this period.