It was ruled by the Muslim Rajputs named Kyam-Khanis <Chauhan that converted to Islam during Feroze Tughlaq> for nearly three centuries. With the decline of the Mughals, Hindu Rajputs reclaimed these and entire Shekhawati was divided into 33 thikanas/pargana
Now this fragmentation of estates created a problem, as these new small rulers needed money to run their estate. For this they needed Merchants to act as revenue officers, moneylenders or as Modi <suppliers of provisions to their Army>
At times in the middle of opportunity, difficulties arise. So as the fame of success of Marwadi trading was going around, it created two problems (a) Maratha & Pindaris incursion (b) internal disturbance. Since, most of these Kings were still depended on local thakurs.
Now, these Thakurs started becoming ambitious and as Ambition is a Hard-task master, they themselves started getting their hand dirty by looting these trade caravans. The many Kingdom (esp Bikaner) complaint to the East India Company and asked them to resolve this problem.
Now, EIC came with unique solutions: First, they shifted brigade to Jaipur state, more importantly, they started enrolling these Thakurs into their Army. They realised what they needed was Name, Fame & Money. They also decided to bring Shekhawati, under its direct rule.
Surajmal Jhunjhunwala will set up a charitable mess for Marwaris working in Calcutta where a lot of business networking will take place in the next century. G.D. Birlaās grandfather, Shiv Narain will stay there for a very long time.
Britisher loved the twin power of Arms and Financial power of Shekhawati and soon this region became the Hub sourcing for their Army. And, it continued post-independence also. As per a 2018 data, Jhunjhunu alone had ā of all martyrs (from Rajasthan), Sikar been the Second.
āWe donāt have Power, but we have Money. With Money, we can get Powerā.
PS: Detailed Thread on Marwadis is still pending.