The answer is the light bulb.
Since Roman was expanding and it didn't have control of their lands and couldn't govern most of it. It kept expanding until the western part of Roman was conquered by Barbarians.
Answer:
The current ICBM force consists of Minuteman III missiles located at the 90th Missile Wing at F.E. Warren Air Force Base, Wyoming; the 341st Missile Wing at Malmstrom Air Force Base, Montana; and the 91st Missile Wing at Minot Air Force Base, North Dakota.
Russia, the United States, China, North Korea and India are the only countries currently known to possess land-based ICBMs, Israel has also tested ICBMs but is not open about actual deployment.
Explanation:
I did some research and the lowest range was 1,000,000 and the highest was 1,700,000. Its hard to estimate this because they didnt have the proper recording instruments we have today.
