Perhimpoenan Indonesia

After the nationalist turn, the PI saw it as one of its principle tasks to seek support from anti-colonial and anti-imperialist organizations and movements in other parts of Europe.

Indonesian students were also present at the pacifist Congrès Democratique International in August 1926 in the French town of Bierville, and at several meetings of the League against Imperialism from February 1927 onwards.

Mohammad Hatta, who was the chair and most important of the Indonesian students, was appointed in the executive committee of the LAI, and thus acquired much prominence and an extensive international network.

On 23 September, Mohammad Hatta, Ali Sastroamidjojo, Abdoelmadjid Djojoadhiningrat and Nazir Pamontjak were arrested and put under charge.

Prominent nationalists, among whom Hatta and Sjahrir, were expelled from the association, and de facto the PI changed into a front organization of the Communist Party of the Netherlands.