Why did D-Day become the key to Allied success in the European Theater?

Before world war 1 started, austria-hungry was wary of (spain or serbia) because of border disputes

Which statement best describes standard oil in the late 1800s? standard oil controlled only a small number of the nation’s oil refineries. standard oil was a single business that operated in a small region. standard oil controlled only the means and methods of oil production. standard oil owned ninety percent of all oil refineries in the united states.

Which of the following contributed to the grown and success of the roman empire