The Imperial Japanese military became increasingly desperate as the Allies began to draw the noose around the Home Islands. They recommended a Last Stand on a national scale, and began training schoolchildren to fight with sticks, but when the Emperor supported the decision to surrender, many military officers chose seppuku as an alternative, inclusive of those officers who tried to stop the Emperor's broadcast and continue fighting without his Majesty's approval only to be arrested.
Adolf Hitler also had this, when he realized that the Allies in the West and the Soviets in the East are closing in on him, and there was no chance for him to win. He ordered his forces to fight to the last man, and burn Germany to the ground, to deny the Allies of anything. Fortunately many of his officers choose to ignore this, while some weren't so lucky when they ended fighting the Soviets..
He had already come close to this thirty years earlier when his wife and his mother died on the same day: Valentine's Day 1884.
Many of "the Projects" in the US from the 1960s fell into this. Now many of the people living in them have no hope of ever improving their lives. The sad part is there are now up to 4 generations who have lived this way.
The housing agencies in many cities are demolishing the high-rise projects and replacing them with developments of single-family homes. Whether this will make a difference remains to be seen.
Chris Hedges, an influential left-wing columnist and former Pulitzer-winning war correspondent, has beenaccused of using his more recent writings to pull readers into his own Despair Event Horizon, especially with regards to corporate power and environmentalism.
This is essentially what depression is (the feeling that there is no hope).
Also why many people commit suicide or want to commit suicide.
There are also several factors in one's life that can lead to depression, especially if each factor is back to back. For example, someone gets laid off from their job, then they're unable to find a job due to the lousy economy, which is then followed by having items repossessed or even losing the house because they don't have any money to pay the bills, which in turn leads to them being forced to live in a homeless shelter while getting minimal food, which can also lead to the person getting ill and not being able to afford to get treated. All this can cause a person to simply give up on life and stop trying to find a way to better themselves or they may even resort to a life of crime seeing that they have nothing else to lose.
Ravens usually mate in monogamous pairs for life. If one of the pair dies, it isn't uncommon for the other member to become despondent, sometimes even to the point of deliberately starving themselves to death. "Quoth the raven, 'nevermore.'"
The argument that the "you break the enemy's morale, and you can achieve victory even without military success" manifestation of this trope was successfully invoked by the Entente against Hindenburg, Ludendorff and the German High Command in general at the close of World War One was a major contributor to promoting the "stab in the back" legend and Hitler's subsequent rise to power.
Historians speculate that the Battle of Gettysburg was the horizon for the Union in the The American Civil War, though it was ultimately not crossed. They had superior troop strength, economy and manufacturing over the Confederacy, but at that point public opinion was against the war and morale was extremely low. Conversely, the Confederacy had absolute faith in their leadership, as Lee had led them to victory after victory. It is thought that if the Union had lost that battle, it would have been the beginning of the end and the nation would have been forced to sue for peace.
Some historians have discussed the prospect of the Emancipation Proclamation being this for the Confederacy. One of the major goals of the Confederate Army was earning recognition and aid from European powers. When the Proclamation emerged, it transformed what had up until then looked like a war of reunification into a crusade to end slavery - which absolutely dashed any hope of Europe backing the Confederacy (any nation that did would be tacitly supporting human bondage). That did severe damage to morale, but it got even worse as the common soldiers realized defending slavery would be worthless to them - slaves cost hundreds of dollars, well beyond the average Southerner's reach (this is where we get the term "A rich man's war, but a poor man's fight"). It's worth noting that desertions skyrocketed after the Emancipation Proclamation.
Bill Simmons frequently discusses this regarding sports fans, as he has experience being from Boston (before all four teams became victorious in the 2000s, all had droughts made even more unbearable by disheartening defeats - even the post-Larry Bird Celtics). He wrote the "Levels ofLosing" regarding how bad a defeat can be, and also listed "tortured teams" making it clear they have to go past the Despair Event Horizon to qualify:
You need to be just pessimistic enough to keep your guard up for a sucker punch but just optimistic enough to keep lowering your guard at the worst possible time."
The first President of Brazil, Deodoro da Fonseca suffered a biblical one after being impeached (which he took very personally). To give some context, Deodoro was known as a Boisterous Bruiser jokester and Fun Personified to his friends, described as "lion-hearted". But after his impeachment, Deodoro locked himself in his house and spent his days rotting away in a chair, smoking his already damaged lungs away. He forbid anyone in a military uniform to ever enter his house (keeping in mind he used to be a bona-fide, very patriotic war-hero). He died less than six months later.
Some people wrongly believe that Friedrich Nietzsche preached this trope as a philosophy, but that's not quite true. A much better "religion of despair" can be found in the writings of his inspiration and predecessor, Arthur Schopenhauer.