"This is the first visit dedicated to peace affairs," the president said.
"We are ready to restore the Ukrainian sovereignty in the Donbas. This is what Ukrainian people want, what the Donbas wants. The lion's share of my visit to the Donbas is devoted to peace issues. Peace is what the Donbas and Ukraine want!" Poroshenko said.
In addition, the president called on the Russian servicemen to leave the territory of Ukraine.
"I appeal to the Russian military - get out of our Donbas!" Poroshenko stressed.
During the visit to Mykolaivka, the president emphasized the need to restore the destroyed infrastructure.
"We have restored the destroyed house in Mykolaivka within four months. The happy eyes of people returning home is the symbol of the revival of Donbas. Liberation of Donbas began from the release of Mykolaivka," the president said at opening ceremony of the restored house.