First brigade: Kabardian Cavalry Regiment (consisted of Kabardin and Balkar) and Dagestan Cavalry Regiment. Second Brigade: Tatar Cavalry Regiment (consisted of Azeri Turks) and Chechen Cavalry Regiment. Third Brigade: Circassian Cavalry Regiment (consisted of Circassians and Karachays) and Ingush Cavalry regiment.
Feyzulla Mirza Qovanlu-Qajar, one of the Azerbaijani commanders and major-general of Russian Imperial Army.
Well. Not in this case. Most of the men who enlisted in the "Savage Division" were simply "blood thirsty" and wanted to fight no matter who, for them it was an adventure. There was even a competion among Caucasians who will go to fight, because the numbers that the Russian army could allow were limited. So, those who couldn't go felt very humiliated.
You need to understand that it depended on the culture and social position of those people. Most of the North Caucasian peoples and Turkmens (at that time) have very strong warrior and I would say even "knight of the road" mentality (unlike, for example, as Kazakhs or Uzbeks who are rather peaceful people). In fact, in the end of the war Russian government tried to conscript Kazakhs for civil works on the front, as they couldn't be conscripted in the acting army, that didn't work out and ended with riots because Kazakhs didn't want to go. Also, most of those guys from the "Savage division" represented tribal aristocracy for whom "war" was the natural occupation, unlike farming and herding. It was one of the reasons why it was regarded as "elite" unit and was under the command of a brother of the Tsar.
Also note, that Russian government, being very smart, never used "Savage division" or other Muslim units against other Muslims such as Turks. "Savage division" fought exclusively with Germans and Austrians. Intrestingly, on the other hand, most of the ethnic German Russian citizens (there were a lot of those) who served in the Russian army, as a rule, were sent to the Turkish front.
I absolutely agree that it depends on the mentality of the nation and each warrior, russians always were aggressive even in our days, just look what happened to their neighbors .