Juan Muñiz was requested by J. F. Rutherford, then president of the Watch Tower Society, to move from Spain to Argentina to organize and expand the preaching of the good news in that part of the earth. He arrived in Buenos Aires on September 12, 1924, and not long after that, he personally traveled into Uruguay and also into Paraguay to spread the Kingdom message. Seeds of Bible truth were sown, but little progress was made.

Juan Muñiz shared in introducing the Kingdom message to Paraguay