Why are these graves in Niagara-on-the-Lake on sovereign Polish land?

Every year since the Spanish flu outbreak in 1919, people have made a pilgrimage to the town to honour the Polish men who died at a military training camp — and the “angel of mercy” who cared for them.

Read the article here.

In 1918, Niagara-on-the-Lake was home to a military camp. Canadian soldiers trained there, but so did a Polish force fighting to repatriate that country. The Polish camp was the site of Canada's first Spanish Flu outbreak. The men who died are still commemorated each year. [1/8] https://t.co/bXbA68x9Q0 pic.twitter.com/z0x9qyfZI2

— Justin Chandler (@mr_lois_lane) October 7, 2020