In two to three sentences, explain the role of "nationalism" in the conflict between Russia and Austria-Hungary

The Russian tsar believed his empire was protected by God and by a 1.5 million men army. This nationalist view made Russian leaders believed they had power over the smaller nations of western Europe. On the other side, the Austro-Hungarian empire showed its nationalism when it declared a war because of the assassination of Archduke Franz Ferdinand.

ww1 weapons: tank. tanks were used for the first time in the first world war at the battle of the somme. they were developed to cope with the conditions on the western front. the first tank was called 'little willie' and needed a crew of 3.