What happened September 1918 AD

Armstrong played in brass bands and riverboats in New Orleans, first on an excursion boat in September 1918.

Serbian and French troops finally made a breakthrough in September 1918 in the Vardar Offensive, after most of the German and Austro-Hungarian troops had been withdrawn.

September 1918 was the development of the second influx of this season's cold virus was at Camp Devens, an Army preparing camp for the United States outside of Boston, and at a maritime office in Boston.

The flu was first added to a disease report when the New York City’s Board of Health added it to the list of reportable diseases and required all cases infected by the flu to be isolated at home or in a city hospital.

The German Empire was dissolved in the German Revolution 1918-1919, and a Weimer Republic was created.

The battle was fought in the initial stage of the Vardar Offensive, in the Balkans Theatre. On 15 September, a combined force of Serbian, French and Greek troops attacked the Bulgarian-held trenches in Dobro Pole ("Good Field"), at the time part of the Kingdom of Serbia (present day Greece and North Macedonia). The offensive and the preceding artillery preparation had devastating effects on Bulgarian morale, eventually leading to mass desertions.

Truman's unit joined in a massive prearranged assault barrage on September 26, 1918, at the opening of the Meuse-Argonne Offensive.

Stravinsky struggled financially during this period. Russia (and its successor, the USSR) did not adhere to the Berne Convention and this created problems for Stravinsky when collecting royalties for the performances of all his Ballets Russes compositions. Stravinsky blamed Diaghilev for his financial troubles, accusing him of failing to live up to the terms of a contract they had signed. He approached the Swiss philanthropist Werner Reinhart for financial assistance while he was writing L'Histoire du soldat (The Soldier's Tale). Reinhart sponsored and largely underwrote its first performance, conducted by Ernest Ansermet on 28 September 1918 at the Théâtre Municipal de Lausanne. In gratitude, Stravinsky dedicated the work to Reinhart and gave him the original manuscript.

By 25 September British and French troops had crossed the border into Bulgaria proper as the Bulgarian army collapsed. Bulgaria capitulated four days later, on 29 September 1918.

At the end of September, over 14,000 flu cases were reported at Camp Devens—about the quarter of the camp were infected at the time, this resulted in 757 deaths.