Final answer:
General Dwight D. Eisenhower's speech, the 'Order of the Day,' was delivered in anticipation of the Allied invasion of France on D-Day. The passage indicating the occasion is 'After months of assembling and training troops, the Allies began their invasion of France at 2 a.m. on June 6, 1944-D-Day.' This represented a pivotal moment that General Eisenhower would address in his speech.
Step-by-step explanation:
The passage that best indicates the occasion of General Dwight D. Eisenhower’s speech can be found in the excerpt detailing the preparations and initiation of the Normandy invasion, also known as D-Day. The sentence that signifies this momentous event is: “After months of assembling and training troops, the Allies began their invasion of France at 2 a.m. on June 6, 1944-D-Day.” This sentence sets the stage for the speech, as it describes the decisive action that the Allied forces were about to engage in, which General Eisenhower would address in his Order of the Day speech to the troops.
Another significant piece of information from the text highlights Eisenhower's rapid rise through the military ranks due to his expertise in training and organization, as well as his effective leadership as the commander of the European Theater of Operations. His promotion to a key aide to Chief of Staff George C. Marshall and commanding general is also crucial in understanding the broader context of his role in World War II.