Internationalist Struggle (LI) (Spanish: Lucha Internacionalista, Catalan: Lluita Internacionalista) is a Trotskyist organisation in Spain. It is part of the International Workers' Unity – Fourth International.

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Internationalist Struggle Lucha Internacionalista Lluita Internacionalista
Headquarters	Barcelona
Newspaper	Catalan: Lluita Internacionalista Spanish: Lucha Internacionalista
Ideology	Trotskyism
National affiliation	Popular Unity Candidacy
International affiliation	International Workers' Unity – Fourth International
Website
luchainternacionalista.org/
Politics of Spain Political parties Elections

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LI is a republican organization that supports the self-determination for the peoples of Spain and is a full member of the Trotskyist International Workers' Unity – Fourth International.

LI was born of a split of the Revolutionary Workers' Party in 1999, mainly by members of the city of Barcelona.

In the Catalan elections of 2010, LI supported Des de Baix, along with Anticapitalist Left, In Struggle and Corriente Roja, failing to gain any seat.