In 1918, Lashkevych joined the Bolshevik Party, he was drafted into the Red Army and was assistant commander of the 13th Soviet Regiment.

[1] In Zaporozhye, to combat drunkenness within his ranks, Lashkevych issued a decree on the garrison banning the sale of alcohol to the rebels in the city.

[2] On 28 October 1919, the 13th regiment occupied Yekaterinoslav, and sank the defenders of the city with the 4th consolidated division and a brigade of guards.

[4] As the head of the Yekaterinoslav garrison, Lashkevych received 5 million rubles of indemnity, but he did not turn it over to the army cashier.

At this time, local rebels, the Greeks, began to come to the headquarters and tell what a riotous life Lashkevych led in the village.