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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They were focused on smarts instead of strength. although they were very sexist and didn't allow women in gov.
<span>Throughout the Middle Ages, religion was a strong, pervasive force in society. Most individuals were more concerned with God and the possibility of the afterlife than they were with current human affairs, says Encylopedia Britannica. By the time the Renaissance occurred, this social attitude was beginning to change. Religion was still practiced, but people began to be more focused on secular or humanist values, rather than spirituality, at this time.</span>
