After his visit to the war-torn country, Mr Martin said he was impressed by the resilience of the Ukrainian people, describing his time there as “very emotional”.
The Fianna Fail leader is back Dublin on Thursday after he spent the day observing the devastation caused by invading Russian troops in the conflict-ridden suburbs Kyiv who bore the brunt of the attack on the city.
The excursion included a somber visit to the place of a fraternal burial on the territory of the church in Buchi.
Martin held a bilateral meeting with the President of Ukraine Vladimir Zelensky in the Ukrainian capital.
He said: “We met first-hand with many communities who were deeply traumatized by the level of atrocities committed against their people by Russian Federation soldiers in Buch and Barodyanka.
“It was very difficult to fathom the level of cruelty and inhumanity that was and continues to be happening in Ukraine.”
When asked what impressions remained from the visit, Martin answered that it was the resilience of the Ukrainian people.
For me, this demonstrated extraordinary resilience on behalf of the people of Ukraine.
“When you’re in a place like Bucha and you have to imagine that Russian troops were there, that were on the outskirts of Kiev, and that the Ukrainian military and people managed to push them back again,” he added.
“For me, this demonstrated extraordinary resilience on behalf of the people of Ukraine.
“And then unnecessary atrocities and death, especially the death of children.”
During a visit to the museum, Mr Martin placed a teddy bear at a memorial to children who died in the conflict.
Mr. Martin then visited the memorial to the victims of the Holodomor in Ukraine in the early 1930s.
“It is very difficult to understand how a person can start a war in which so many children die and are killed,” he added.
“As we left Kyiv last night, there is an exhibition on the railway documenting the horrific scenes we all saw on our TV screens as thousands and thousands of people ran to leave.
“A very, very emotional exhibition.”
Mr Martin also said it was “very good” to see the EU and UK working well in the war response.
“It is very clear that they appreciate the support they have received from the European Union and the UK,” he added.
“It made me understand the importance of our humanitarian aid in terms of our very early decision, which is very much appreciated by the Ukrainian government, to accept refugees fleeing war and people who have been displaced fleeing war.
“Also, we are very strongly in favor of Ukraine becoming a member of the European Union.
“It was acknowledged and articulated yesterday.”