Among the most important, the September 23 Communist League was at the forefront of the conflict, active in several cities throughout Mexico, drawing heavily from Christian Socialist and Marxist student organizations.
Di antara yang paling penting, Liga Komunis 23 September berada di garis depan paling depan, aktif di beberapa kota di seluruh Meksiko, yang paling banyak berasal dari organisasi mahasiswa Kristen Sosialis dan Marxis .