Tournaments are Special Events in which you can take part together with your Alliance.
To enter a Tournament, once it starts, an Alliance has to win a war while the tournament is active.
While the tournament is active warning an opponent Alliance gives points based on Prestige Level of the Alliances involved. In the last hours of the Tournament, it goes into 'HEAT MODE', during this time winning Alliance earn 2x points.
Total Domination, State Wars and normal wars all contribute to the tournament points earned. But if an Alliance loses more than 30% of their wars, Alliance get locked and stop giving tournament points to an opponent. They have to win wars to correct the ratio and unlock the Alliance again.