Complex sentence: Born on 12 August 1892 in Metz, Ludwig Bieringer joined the German military straight from school in 1913, and in the First World War, he was a Oberleutnant (First Lieutenant).
Split into simpler sentences: Born on 12 August 1892 in Metz, Ludwig Bieringer joined the German Army straight from school in 1913. During the First World War, he was a Oberleutnant (First Lieutenant).