Suspected Dagestan bomber the North Caucasus visited Dagestan last year . Dagestan is an impoverished Russian republic in Tamerlan Tsarnaev region . The legendary Imam Shamil , who led the war against the Russian Tsar 's armies between 1834-1859 as they sought to conquer the area , belonged to Dagestan 's Avar ethnic group . the Russian Tsar 's groups warring against Dagestan are active , have deep roots in Dagestan . Rajan Menon : Life in Dagestan can be chaotic , violent and short .
Suspected Dagestan bomber the North Caucasus visited Dagestan last year . Dagestan is an impoverished Russian republic in Tamerlan Tsarnaev region . the Russian Tsar 's groups warring against Dagestan are active , have deep roots in Dagestan . Rajan Menon : Life in Dagestan can be chaotic , violent and short .