The most prominent of these factions was the Umma Party (Reform and Renewal) headed by Mubarak al Fadil al Mahdi, who is the first cousin of Sadiq al Mahdi and former Interior Minister when the Umma Party was last in power under Sadiq as Prime Minister from 1986 to 1989.
Abdu Rabb was born to Muslim League Leader and former Deputy Chief Minister of Kerala Late K. Avukader Kutty Naha and Kunhibiriyam Umma.
After the 1998 Coimbatore bombings and the communal violence that ensued from it, members of the TMMK were arrested following the banning of the related Jihadist group al-Umma (listed in Extremist Groups) who were directly behind the blasts.
The only known example of an actual inter-state conflict over water took place between 2500 and 2350 BC between the Sumerian states of Lagash and Umma.