march against (someone or something)
To join in a protest march in opposition to someone or something. Nearly 200,000 people have come to march against the legislation being pushed forward by the new administration. Protestors marching against the new prime minister were violently dispelled by police forces earlier this morning.
march against someone or something
to march in a demonstration against someone or something. The demonstrators marched against the mayor. The citizens got together and marched against crime and injustice.