Can anyone recommend a good source on this sort of thing?
My basic questions basically pertain to the military establishments (army and navy) of Hindu states -- and, in particular, the role of the kshatriya varna. I'm mostly thinking of Hindu states in antiquity or the middle ages, like the Guptas or the Rashtrakutas. TBH, I'm a little lost when it comes to Indian history.
Basically, what was the role of the kshatriya varna, militarily?
Were basically all soldiers kshatriya? Or was it that more elite positions like officers and heavy cavalrymen were kshatriya, but common soldiers were drawn from all varnas? Or did they actually make much less of a big deal out of it than I'm assuming, and Hindu princes cared much more about whether people could fight or command well -- and whether they were loyal -- than their jati or varna?
Did non-Hindu rulers such as the Mauryans differ in how they constituted their armed forces, with respect to jati distinctions?
Did different jatis within the kshatriya varna have different roles? For example, might one jati be established as a source of archers, and another as a source of heavy cavalry, and another as a source of sailors and naval warfare specialists?
Were there ever any attempts to create guard units drawn from lower castes (or dalits), in the hopes that they wouldn't have the social standing to pose a threat to their sovereign as a kshatriya guard might?