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Dear Mr. Boyer,
Thank you for posting your request on History Hub!
The article you seek is available online at https://www.archives.gov/publications/prologue/2017/spring/wwi-america-enters.
Also see https://www.archives.gov/publications/prologue/index for access to many additional articles of Prologue Magazine from 1997 though 2017.
We hope this is helpful.
Thanks. That was exactly what I was looking for. And I appreciate the other link to Prologue. Wish that magazine continued.