Italia Irredenta consists chiefly of the Trentino (tren-tee´no), a triangle of territory dipping down into the north of Italy, and some land around the northern end of the Adriatic including the important city of Trieste. Both of these regions are ruled by Austria. For many years this situation has led to ill feeling between the two countries. While it has not had so direct a bearing on the outbreak of the World War as the question of Alsace-Lorraine, it nevertheless largely explains the entrance of Italy into the war on the side of the Allies.

Russia and the Bosporus.—Still another situation which in the years before the war was the cause of international jealousies was Russia's long-standing ambition to control Constantinople on the Bos´porus. As Constantinople is the capital of the Turkish Empire, the continued existence of that state, at least on the continent of Europe, was threatened by Russia's purpose. Russia has long been in need of an ice-free port as an outlet for her commerce. Archangel (ark´ān´jel) in the north is ice-bound most of the year. Vladivostok´, her port on the Pacific, is ice-bound for three months of the year. Russian trade by way of the Baltic must pass through waters controlled by other countries. Naturally she has turned toward the Bosporus and Dardanelles (dar-da-nelz´)—the straits connecting the Black Sea with the Mediterranean—as the natural outlet for her trade, and this explains her desire to possess Constantinople.

For centuries Russia has been so much more powerful than Turkey that she would surely have taken possession of Constantinople if the other nations of Europe had not interfered. On two different occasions during the nineteenth century England came to the assistance of the Turkish Empire and saved Constantinople from the Czar. Great Britain was led to take this action through fear that Russian control of Constantinople might endanger the safety of her own communications with India. In the years immediately preceding the outbreak of the Great War the danger from Germany made other quarrels of much less importance, and England's disagreement with Russia over her desire for a trade outlet was forgotten.

European Ambitions in the Balkans.—Russia has always felt a strong interest in the small nations of the Balkan peninsula. Their inhabitants are for the most part Slavs, of the same race as the Russians themselves, and they have naturally looked upon the great Slavic empire of the Czars as their protector. There was, moreover, a pan-Slavic party in Russia, i.e. a group who looked forward to a union of all the Slav nations under the leadership of Russia. The pan-Slavic movement had its beginning in the help Russia had given these states in their revolt from Turkey.

Russia's aims and hopes in the Balkans were strongly opposed by Austria-Hungary. That state has long felt the need of seaports to the southeast and has hoped, with German support, to secure an outlet on the Ægean and to control the whole course of the Danube. This purpose could be accomplished only by annexing a large part of the Balkan peninsula. The Balkan situation, therefore, brought Russia and Austria face to face in opposition to each other. It was one of the most serious instances of international rivalry in the period before the war.

Italy also was interested in the Balkan question. She saw that if the Austrians should annex the Balkan lands lying to the south they would control the whole eastern shore of the Adriatic. Italian interests and ambitions would suffer. This fear, added to the constant bitterness caused by the problem of Italia Irredenta, inflamed the hostility of Italy toward Austria.

Finally, Turkey also had an interest in the Balkan situation. She hoped to benefit by the various jealousies of the great powers. She believed that fear of a general war would keep all of them from making any move in the Balkans and so would prolong her own shaky existence as a European state.

Rival Colonial Empires.—Some time after the establishment of the German Empire, her rapidly growing wealth, population, and trade led her to regret the opportunities for colonial expansion that she had missed. She cast jealous eyes upon the vast colonial possessions of other nations. She also took what was left over,—several large regions of Africa, a port in China, a few islands in the Pacific,—not nearly enough to satisfy her ambitions. South America was closed to her by the policy of the United States which is expressed in the Monroe Doctrine. In Asia, however, she secured extensive commercial and industrial concessions—the forerunners of political control—in the Turkish Empire. Germany's desire for colonies was natural enough, but her jealousy of her more fortunate European neighbors must be considered as one of the reasons underlying her military and naval preparedness for war.

Germany's covetous attitude toward the colonial possessions of other nations led to several serious international disagreements in the years before the Great War. More than once it almost brought her into conflict with the government of the United States. An agreement had been made for the joint control of the Samoan Islands by Great Britain, Germany, and the United States. Germany's attempt to enlarge her interests in the islands led to a quarrel with American officers. An American flag was seized by armed Germans, war vessels were sent to Samoa, and a naval battle seemed about to take place. A hurricane destroyed the vessels, however, before any fighting had occurred, and the three countries drew up a treaty which settled that particular difficulty (1899).

Germany also resented our acquisition of the Philippines and other Spanish colonies. At the outbreak of our war with Spain in 1898, when Admiral Dewey steamed into Manila Bay, he found there a German fleet that was half disposed to interfere with his operations. But when Dewey showed a willingness to fight, the Germans withdrew.