Ukraine President Volodymyr Zelenskyy announced last February that his country would welcome foreign military volunteers following Russia's invasion.

Among those to answer the calls was former Navy SEAL Daniel W. Swift. According to Fox News, Swift was killed in Ukraine this past week.

Swift deserted in 2019 after distinguished career

The network noted that Swift joined the Navy in 2005 and went on to serve for nearly fifteen years, during which time he was awarded the Legion of Merit, Joint Service Commendation Medal and the Navy/Marine Corps Commendation Medal.

However, the Oregon native deserted for unknown reasons in 2019. The Navy provided Fox News with a statement that read, "We cannot speculate as to why the former Sailor was in Ukraine."

Fox News reported that Swift's death last Wednesday made him the sixth American citizen to die while fighting in the war.

In June, the network profiled a former U.S. Army soldier and Iraq War veteran who volunteered to help train Ukrainian recruits.

"These are ordinary civilians who, 1776 style, have decided to answer their nation’s call to duty," said the American veteran, who spoke to Fox News on the condition of anonymity.

"They’re willing to die for the land that they inhabit. They truly believe that the direction is towards a classically liberal, democratic society integrated with western values," he continued.

"I am a fan of the culture and people of Ukraine," the man stressed, adding, "They have rejected their communist past and they love our country more than some of our own people."

"If Russia is able to control major port cities and swaths of agricultural land, along with maintaining influence on American allies through pretropolitics, our transatlantic alliances and businesses will collapse," the soldier predicted.

"The resulting food crisis will affect the developing world and cause more migrants to flood into Europe and disrupt the political systems," he argued.

Ukraine offers citizenship to foreign volunteers

Fox News previously spoke with another former American soldier and Iraq War veteran identified only as "Paul" who also traveled to Ukraine.

The network reported last March that First Deputy Interior Minister Yevhen Yenin extended an offer of Ukrainian citizenship to foreigners who volunteered to fight.

⚡️Foreign volunteers will be able to obtain Ukrainian citizenship if they want to, First Deputy Interior Minister Yevhen Yenin said on March 9.

Twenty thousand foreign volunteers have joined Ukrainian forces to fight Russia since March 6.

— The Kyiv Independent (@KyivIndependent) March 9, 2022