Casimir Pulaski Day is an important holiday in Chicago, which has more Polish Americans than anywhere else in the United States. Although not well remembered in the rest of the country, Pulaski was a Polish-born hero of the American Revolution and a cavalry general. What concept helps to explain why this holiday is so much more important to people who trace their ancestry to Poland

- Symbolic ethnicity

Explanation:

''Symbolic ethnicity'' is described as the nostalgic loyalty, love, and pride that one possesses towards his/her culture, ethnicity, and tradition.

In the given situation, the 'Casimir Pulaski Day' would be a significant day for the ones who possess ancestry towards Poland because of the symbolic ethnicity they have towards their native country and for the ones who've made the struggle in the revolution for their country. The ones who have a sense of belongingness to Poland will not only feel a sense of gratitude and honor for him due to the contribution Pulaski made but also feel proud of having such a great revolutionary in their country.

well 1 they have there leader that controls them