Was the war success for the US?
That depends on which aspect you are looking for. They did end WW2 which was a huge success but they did a bear minimum to every other country. In Saving Private Ryan, they made Omaha Beach look so difficult. They actually had the easiest beaches to take, Omaha and Utah, and they still managed to screw up. On their trip there, they got lost and landed far to the south to be anywhere near the beaches that they had to take. The Canadian assault force was stuck with Juno beach. Juno beach housed concrete pillboxes, bunkers and an anti-ship/personnel cannon made soley of concrete and shells. The Canadians had to scale the massive conrete wall while being shot at. They managed to successfully take the beach and capture the town of Caen within 2 days. Which was more successful.
Many US Civil War historians trace the Southern conviction that offensive operations were preferred to tactical defense to the Mexican American War. In that war, US offensive actions proved to be effective against Mexican armies. Confederate generals ignored the success of tactical defenses in the Mexican War and thus placed great faith in offensive assaults in the US Civil War.
What was a key factor in the overwhelming success of the US Third Army in the war games held in Louisiana in 1941?
The Communist North Koreans INVADED South Korea, and the US & UN pushed them back into North Korea...the war was to preserve the Republic of South Korea from communist conquests; the Republic of SOUTH Korea still exists today because of the success of the US/UN forces during the Korean War (1950-1953).
The US decided to enter WW1 on the side of the Allies because of German submarine warfare, the release of cables attributed to the Germans encouraging Mexico to attack the US, and the success of anti-German propaganda. The US decided to enter the WW2 on the side of the Allies because Japan invaded the Philippines and other US holdings in the Pacific and bombed the US Pacific Fleet at Pearl Harbor, so the Us was…
What is the view of perhaps the most preeminent historian of the US Civil War say about the wars outcome?
Among the top historians of the US Civil War is James M. McPherson. He has studied and written many important books on the US Civil War. He is not alone among his peers in saying that there was nothing inevitable about the Union winning the US Civil War. He stresses that the Union's success depended on maintaining Northern morale and that positive morale was tied in part to Union military campaigns.
The main goal for the reconstruction in the Civil War was to rebuild and accept the South in the US again, but radical republican reconstruction wanted to make the South pay for what they had done. The radical republican reconstruction was somewhat of a success in that they had several bills passed in Congress against the South.