This is most likely specifically asking for World War I.
The first thing is rather not a gain, but a trust. Most of Europe, Asia, as well as the Middle East and Africa, were split into two camps. These camps were alliances, known as the Central Alliance (the German & Austrio-Hungary camp), and the Allies (The British & French camp).
The war was triggered by the assassination of Archduke Franz Ferdinand and his wife Sophie by a Serbian Nationalist who wanted to see a free Serbia. While Serbia was open to paying for reparation, Austrio-Hungary threw away the table in hopes of conquering and claiming Serbia for their own. The failure for the gears of war to stop before then was what caused the countries to go at war. Each country was bound by their alliance contract to help their members at need, and so it set off a chain reaction that ensued into a global war.
They had nothing to gain, but to keep their own honor, the survivability of their state, and the trust of their allies.
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hope this helps
Explanation:
The Columbian Exchange — the interchange of plants, animals, disease, and technology sparked by Columbus's voyages to the New World — marked a critical point in history.
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The Anasazi built their dwellings under overhanging cliffs to protect them from the elements. Using blocks of sandstone and a mud mortar, the tribe crafted some of the world's longest standing structures.
Explanation:
WAR is the answer i think
