What type of details about yakym somko can be gathered from the following bio? Bio: yakym somko -lrb- , -rrb- -lrb- born ? in pereiaslav , died on september 28 , 1664 -rrb- , was a ukrainian cossack military leader of the pereyaslav regiment and was the acting hetman of left-bank ukraine in 1660-1663 , during the ruin . he was first appointed captain of the pereiaslav regiment in 1654 , and became the acting colonel in 1658 . at the pereiaslav council of 1660 that that concluded the treaty of slobodyshche he was elected colonel of pereiaslav regiment and acting hetman of left-bank ukraine . but he strongly opposed the treaty because it restored the union with poland , and annulled the pereiaslav articles , which he favored more of a pro-russian orientation . which caused a civil war between right-bank cossacks who favored a pro-polish policies , and left-bank cossacks who favored pro-russian policies . in 1661 he led a revolt against yuri khmelnytsky with left-bank regiments , and zaporozhian otaman ivan briukhovetsky . during the russo-polish war he fought against the poles , and the crimean tatars , in order to re-unite all of the cossack lands under his reign . at first he was a strong supporter of tsardom of russia , but initially withdrew his support because of disagreements , and lack of help on restoring ukraine . but russia started seeking aid with somko 's opponents , in particular with ivan briukhovetsky who supported russian rule , they in turn started accusing somko of secret negotiations with khmelnytsky , and pavlo teteria , which caused to delay the final decision of the cossack starshyna council at kozelets in 1662 to recognize his tenure as hetman . in order to decided on a new hetman , a chorna rada took place on june 17 -- 18 , 1663 near nizhyn , where a cossack council consisting of the starshyna , and a large number of common cossacks elected a new hetman for left-bank ukraine . the officers proposed him and colonel vasyl zolotarenko of the nizhyn regiment as candidates , but the majority and including the tsar supported briukhovetsky and elected him the new hetman...
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