During said chat, a fragment of which Hamill shared on Twitter, Hamill praised the Ukrainian militants who he claimed were "fighting the good fight" and compared Ukrainian forces to the rebels from Star Wars.
"It was a pleasure meeting with the brave Ukrainian drone operators. We talked about the challenges they face on a daily basis, but they also wanted to talk about Wookiees & farm boys & droids, oh my!" the actor wrote in the tweet.
While many social media users praised Hamill for this act, quite a few netizens pointed at the flag that was seen in the video chat hanging behind Ukrainian militants.
The red-and-black banner in question appeared to be the flag of the so-called Ukrainian Insurgent Army (UPA), an infamous Ukrainian nationalist militant group that collaborated with the Nazis during World War II and perpetrated acts of ethnic cleansing against civilians of Polish and Jewish descent in Volhynia and Eastern Galicia.
The flag also bore the emblem known as kolovrat, a variation of swastika often used by adherents of Slavic Neopaganism and by many neo-Nazi groups.
"Mark I know you think you are helping and doing a good and positive thing here but the guys you are talking to have a Nazi flag," one social media user remarked.
"So you met with Nazis. It's interesting how the Sonnerad is actually similar in design the Imperial insignia in Star Wars. You ought to be able to see that yourself,” another user mused.
"Sad to see you embracing the Dark Side in real life,” yet another person complained.
Ironically, many of those who cheered for Hamill used the phrase "Slava Ukraine" ("Glory to Ukraine"), a greeting originally adopted by the aforementioned UPA and used by the people who committed unspeakable atrocities during WWII. At the moment, it is widely used by Ukrainian paramilitary groups, promoted by the Kiev regime.