Yes, that is said. Whatever the case, the Yanks turned the tide in that war with their rifles, tactics and abilities.
Sorry, but American entry did not turn the tide in 1917-18.
That is not to belittle the American troops or their efforts or sacrifice.
But its a myth that American entry turned the tide. The main effort in 1917 and 1918 was still by the British. It was the British who threw back the Kaiserschlact, the last German offensive of the war. It was the British and Commonwealth troops that then undertook ‘the Hundred Days’, the counteroffensive over summer 1918 that drove
And American troops were trained behind the lines in combat tactics by both British and French officers in late 1917 and early 1918. And America relied entirely on British and French tanks and artillery pieces. A fact even uber-patriotic historians like Stephen Ambrose admitted and pointed out.
American troops did not undertake a solo attack until St Mihiel in September. Britain’s heaviest allies in 1918 were in fact Canadian and Australian units.
In 1918, the US simply didnt have the men or material to be the ‘turning point’. That I am afraid is myth.