Germany was far ahead of the Allies in using heavy indirect fire. The German Army employed 150mm and 210mm howitzers in 1914, when typical French and British guns were only 75mm and 105mm . The British had a 6-inch howitzer, but it was so heavy it had to be hauled to the field in pieces and assembled. The Germans also fielded Austrian 305mm and 420mm guns and, even at the beginning of the war, had inventories of various calibres of Minenwerfer, which were ideally suited for trench warfare.

Answer this question based on the article: Which guns were larger, howitzers or Austrian guns?
Austrian