There wouldn’t have been one except for our interference.
That isn't accurate.
The combatants had fought at Verdun for almost a year, sustaining a million casualties without either side gaining an inch.
Then after five months of truce negotiations and subdued warfare, there was no resolution and full scale hostilities resumed. In other words, a year and a half of zero military or diplomatic progress.
That was not a stalemate the US created.
After all this, we entered the war.
Germany then attempted a last full-scale offensive and that failed in July 1918.
By September the first German ally surrendered and then Germany itself in November.
We broke the stalemate and ended the war.