Complex sentence: Rugby had its moments of glory and many Algerian players have been able to achieve successful professional careers abroad, especially in France; but discipline disappeared after the independence of Algeria due to lack of multiple items till 1972 when it disappeared completely.
Split into simpler sentences: Rugby had its moments of glory and many players have been able to achieve successful professional careers abroad, specifically in France. But discipline disappeared after the independence of Algeria due to lack of multiple items till 1972 when it disappeared completely.