Casimir Pulaski Day: March 4, honors Revolutionary War hero.
Illinois celebrates Polish cavalry officer's sacrifices in American Revolution.
Pulaski Day includes school curriculum, educating youth about hero.
Mayor Harold Washington initiated official recognition in 1986.
President Obama declared Pulaski an honorary American citizen in 2009.
Pulaski fought bravely for American cause until death in 1779.
Casimir Pulaski: Polish soldier, American hero, Revolutionary War veteran.
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