A two-part piece from the Jamestown Foundation's Chechnya Weekly:

The Dagestani Jamaat (Part 1)
The Dagestani Jamaat "Shariat" is the direct successor of the Dagestani Jamaat supposedly destroyed on the orders of Vladimir Putin in August and September of 1999. As such, it is one more example of how inefficient a military response is for suppressing an ideological opponent. It is possible to destroy bases, to destroy active participants, but it is quite impossible to destroy an underlying ideology using tanks and planes. Since the large-scale military operation carried out in Dagestan in August-September 1999, Salafi teachings have spread throughout the whole of Dagestan, especially enjoying popularity among the youth of the republic. Thus, Salafi ideology has become a form of protest against Russian policies in Dagestan. It is worth noting that while not all the members of the Dagestani Jamaat are dedicated Salafi adherents, all of them stand united in the anti-Russian struggle, making this ideology a unifying force. There are also small groups in the armed resistance movement in Dagestan that are not controlled by the Jamaat, but they still identify themselves with the resistance movement forces.....
The Dagestani Jamaat (Part 2)
....Jamaat structures are uniform across the North Caucasus and do not vary due to ethnic or regional differences, perhaps in rare exceptions. For nearly eight years, one of the best-known leaders of the Dagestani Jamaat was Rappani Khalilov, a native of the city of Buinaksk and an ethnic Laks. He was replaced as commander of the Dagestani sector of the Caucasus Front by Amir Abdul-Madzhid, who also began as a member of the “Shariat” Jamaat at the start of the second military campaign in Chechnya in 1999 and was one of Khalilov’s closest associates. The “Shariat” Jamaat has units across the entire republic. The republic is divided into zones, such as the Buinaksk, Gubden, Makhachkala, Kizliar, Khasavyurt, Botlikh and others. Amir Abdul-Madzhid himself and others in the sector’s command are members of the Military Council of the Shura under Dokka Umarov and, since Umarov’s recent proclamation of a “Caucasian Emirate,” Amir Abdul Madzhid has been made “Vali of the Vilyat of Dagestan”–that is, the resistance’s de facto ruler in Dagestan. All of the vilayets are united under the leadership of Dokka Umarov, who is considered the personal ruler of this “virtual” emirate, but in fact, each vali is autonomous not by virtue of the formation of an emirate, but strictly due to the absence of authority of Dokka Umarov among those fighting under the flag of the resistance movement......