What best describes the psychic consequences of World War I and the effects on both civilian and military populations?

Question

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World War I led to widespread disillusionment and feelings of betrayal among both soldiers and civilians, as the realities of the war shattered pre-war ideals and expectations. The massive casualties, the use of new, devastating weapons, and the harsh conditions of trench warfare contributed to a profound sense of disillusionment and a feeling of betrayal by national leaders and military commanders who were seen as having led many into a futile and horrific conflict.

What Best Describes the Psychic Consequences of World War I