Baikal Cossacks
Baikal Cossacks were Cossacks of the Transbaikal Cossack Host ; a Cossack host formed in 1851 in the areas beyond Lake Baikal ( hence , Transbaikal ) . 
<triplet> Baikal Cossacks <subj> Cossack host <obj> instance of <subj> 1851 <obj> inception