The Appalachian Mountains, the gulf of mexico, the Atlantic Ocean, and the missippi river
The American Revolution was not a civil war because a “civil war” is typically between two groups within the same country. For instance, Parliament and the King fought each other in the English Civil War. Similar conflicts occurred between the Union and the Confederacy during the American Civil War.
Contrarily, the American Revolution was a conflict between a colonizer and a colony. Usually, these are not referred to as "civil wars," but rather as "rebellions," "revolts," or (to their supporters) "wars of liberation."
Any of these might constitute a "revolution," so long as it alters society, the economy, and culture fundamentally as well as the leadership. As you can expect, this makes the word "revolution" very political. The proponents of change refer to it as a "revolution," whilst the opponents use a less admirable term.
The Civil War would have been referred to as a "revolution" if the Confederacy had prevailed, and the Union may have even done so at some point. Instead, it fell short, and now we refer to the conflict of 1861–1865 as a civil war. It's just another instance of how the winners write history.
Two inventions from the World War two are the radar and the sonar, both of which had a huge impact in the war, but also after it, becoming a widely used devices all over the world.
The radar was an invention that was enabling detection of objects in the air. Initially it is was used for detection of planes, as that's where the biggest threat was coming. This device enabled the soldiers and the civilians to be warned about the oncoming danger, but also to be able to respond adequately to the threat.
The sonar was another invention inspired by the war. It had the same basic purpose as the radar, just that it was used for detecting objects in the water. This was a crucial instrument that gave the submarines big advantage in locating the enemy and destroying it, or if not capable of that, being able to move away and avoid it.
