The policy <span>of giving aggressive nations what they wanted in order to avoid war is called the appeasement policy. It was fairly common throughout history, and in recent times it was noticeable just before world war 2.</span>
The correct answer to this open question is the following.
Although there are no options attached, we can say the following.
The groups of invaders that made the most limited incursions in the Roman Empire were the Franks.
The Franks were one of the Germanic tribes that tried to incursion the Roman Empire territories. As it is said above, the Franks were not a tribe that repeatedly invaded the Roman Empire territory, but indeed had some incursions.
The Franks inhabited the territories of the Lower Rhine and some others lived next to the Ems River. They were known to be fierce warriors and determined people that invaded some other regions as was the case of modern-day Belgium and the North of France.
The stab in the back myth was the notion, widely believed and promulgated in right-wing circles in Germany after 1918, that the German Army did not lose World War I on the battlefield but was instead betrayed by the civilians on the home front, especially the republicans who overthrew the monarchy in the German Revolution of 1918–19. Advocates denounced the German government leaders who signed the Armistice on November 11, 1918, as the "November Criminals"
The Nazis came to power in 1933, they made the legend an integral part of their official history of the 1920s, portraying that the work of the "November criminals" who stabbed the nation in the back to seize power while betraying it.
Because of this people believed the Nazis were still very much so strong and capable to protect Germany. They tried to make people believe this so that they wouldn’t come off as weak. The more people who believed this resulted in more people following the Nazi’s.