A day after supporters applauded Chicago Public Schools’ decision to celebrate Indigenous Peoples Day instead of Columbus Day moving forward, outraged Italian-American City Council members said the change meant it was “time for war with CPS” and a local group vowed to challenge the move.

The decision to drop Columbus Day came in a split vote by the seven-member Board of Education, with members Dwayne Truss and Lucino Sotelo voting against changing the CPS calendar. The October holiday had previously been recognized as “Indigenous Peoples Day/Columbus Day.”