He also took part in the First World War, in all important battles. In the First World War, he mostly performed Reconnaissance tasks. During the Battle of Cer, he carried his wounded friend Ljubo Milenković a few kilometers from the mountain. Milenković begged him to leave him, but Matić saved him, and Milenković was later treated in the hospital in Niš. Furthermore, he participated at the Kolubara,