This is the 13864th most frequent Russian word.
обкомом
"Обкомом" refers to a regional committee of the Communist Party in the Soviet Union.
The word 'обкомом' here refers to the administrative body of a political party in a regional context, acting as the instrumental object in the sentence.
Мы посетили встречу с обкомом партии.
We attended a meeting with the party's regional committee.
The word 'обкомом' is used to indicate that the decision was effected through the instrumentality of the regional committee.
Решение обкомом было принято единогласно.
The decision by the regional committee was made unanimously.
Here, 'обкомом' emphasizes the role of the regional committee as the agent conducting the actions described.