Many people believe that the Second World War was fought in the cities of Europe and on the islands of the South Pacific. It was, but these people forget that the imperial Japanese army occupied the Alaskan islands of Attu and Kiska from 1942 to 1943 for about a year.
This crew shocked and frightened North America, and subsequent events following the occupation prepared many military and ceremonial actions during the war. These are ten interesting facts about the Japanese invasion of Alaska.
10 It was the only country that had lost the US in World War II
On June 6, 1942, the Northern Army of Japan took over the island of Kiska, a remote volcanic island in the Aleutian chain off the coast of Alaska. The next day, exactly six months after the Pearl Harbor attacks, the Japanese took control of Attu Island, including the Aleutians. 
This attack was the first and only land invasion of North American territory during the entire war, and it was considered highly significant at the time, though today's occupation has largely been forgotten by history.
9 It was the first time that Canadian conscriptions were performed. Fought in World War II
Although the Canadian forces later in the later war years should prove to be a highly valuable and active force, declared an initial promise by the Canadian Government not to send Canadian soldiers abroad They are defined as outside North America. Since the occupied territories were considered part of North America, the Canadian government dispatched recruited soldiers to liberate Attu and Kiska.
Although there were several cases of desertion before the trip to Alaska, many Canadians proudly went to the Aleutian Islands to fight with their American allies.  Fortunately, many of the Canadians who were sent to the Aleutian Islands saw no fight, as the Japanese troops had withdrawn before they arrived.
8 During the Battle of Attu, one of the greatest Banzai charges of war took place.
The Banzai counterattack was used by the Imperial Japanese Army during the battle World War II in case of imminent defeat to save the face. In contrast to surrender, the Japanese would rush their enemies with their bayonets as weapons to cause as much damage as possible. While this strategy was ineffective against many Allied soldiers, it shocked many because it showed how much the Japanese are committed to their cause and that they sacrifice themselves to hurt their enemies instead of being trapped become.  On May 29, 1943, Japanese commander Yasuyo Yamasaki, facing a certain defeat at the Battle of Attu, ordered one of the largest Banzai indictments of the Pacific War, appealing to almost all of his remaining men on charges of invading Americans. The Americans, who had not yet seen this type of indictment, were overwhelmed and the Japanese quickly broke through the American lines. However, this victory was short-lived as the Americans recovered quickly and fought off the Japanese forces.  Of the approximately 2,300 Japanese soldiers who occupied Attu, fewer than 30 survived to be captured.
7 The harsh climate called for the lives of many soldiers
The situation of Kiska and Attu in the extreme north of the Pacific leads to brutal weather conditions. These conditions were felt by both the occupying Japanese and the liberating Americans. Originally, the Battle of Attu would take a few days, so the Americans brought only equipment that took so long.
As a result, the equipment deteriorated rapidly. For this reason many soldiers developed frostbite, gangrene and trench foot.  In addition, there was food shortage that contributed to the troubles of the liberating soldiers.
6 It saw the first official case of Gyokusai
Gyokusai was a form of ritual mass suicide carried out by Japanese soldiers in the name of Emperor Hirohito. This was done to prevent capture by the enemy, which was considered the last loss of honor of Japanese society. During the Battle of Attu, when it became clear that the Allies would overtake the island, about 500 Japanese soldiers placed hand grenades near their abdomen and detonated them.
This was a shocking turn of events, touted by some sources as the first official case of gyokusai .  This type of mass suicide and others of this sort would prevail in later years. The war as Japan lost more territory and the defeat became more common.
5 No one is sure why Kiska and Attu had invaded
One might think that the only North American land battle of World War II had a well-documented chain of events from the background to the battle to the aftermath. While the latter two have been extensively documented, the former contains little information. The most popular theory of why the Japanese invaded Kiska and Attu was to divert the attention of the American Navy from Japanese interests in other parts of the Pacific. However, with the US Pacific Fleet fleet in ruins and American generals focusing more on the war in Europe, it was likely that the US was attracting US attention.
Another common theory is that the occupation should protect American troops from invasion of Japan by the Aleutians.  However, with the exception of some bomb attacks by Attu in the later war, the islands did not fulfill any strategic objectives in American war strategy. Still others believed at the time of the invasion that it had been done to gain land as a base of operations for a complete invasion of Alaska or even the Pacific Northwest. However, the exact reason why the Japanese invaded Kiska and Attu remains a mystery to this day.
4 Only Attu had to be released
During the Second World War, there are countless cases of Japanese soldiers fighting to the end and then suicide when they realized that defeat and capture were imminent. It was considered the ultimate shame for one's own family to surrender in battle. As a result, the Japanese would do everything in their power to win and seldom surrender, and some soldiers fought decades after the war ended.
In the case of Kiska, however, the Japanese capitulated without a fight. After the assassins on Attu saw the carnage and the loss of their lives, the Japanese commanders on Kiska saw no way to maintain control of the island. When the weather allowed, the Japanese fled under the fog and made it possible for the Allied forces to retake Kiska quickly.  This is one of the few examples of Japanese surrender during World War II.
3 Attu lost his entire population
Prior to the Japanese invasion, Attu had nearly 44 inhabitants native to Alaska. During the Japanese occupation, the entire population was captured and taken to Japanese prison camps. In these camps about half of the original 44 died due to the harsh conditions. The rest was returned to the United States after the war.
However, they were not returned to Attu because of the expensive cost of rebuilding. Most survivors settled in other Alaskan aborigines, with the descendants of the original residents of Attu returning to the island 75 years later in 2017 as part of a reconciliation effort. 
Few history books and records mention the campaigns of Attu and Kiska and those who seldom mention the naval operations that preceded the American liberation.
In March 1943, after months of neglect from the US, a naval force led by Rear Admiral Thomas C. Kincaid blocked Attu and Kiska in an attempt to stop the influx of Japanese forces. On March 26, 1943, the American fleet involved the Japanese Navy, which was trying to supply the crew of Japanese soldiers with supplies. 
The Japanese forces were known in the so-called "Battle of the Komandorski Islands". They were able to inflict serious damage on the American fleet, but eventually withdrew for fear of American bombardiers and decreasing resources back. The Japanese did not try to ship the supplies again, but only took the occasional submarine run. This weakened the Japanese control of Attu and Kiska and allowed the Allies to take control more effectively.
It is the last battle on American soil
Many Americans believe that the US Civil War takes place in the mid-19th century century was the end of the conflict in the United States. However, this list and the facts presented show that this is not the case. At the present time, there was no further occupation of American soil by an invading force. In addition, there was no conflict or attack that justified the description of "battle". 
The campaign of the Aleutian Islands is still the last battle that has been fought on US territory. Although not as well-known as other American battles such as Gettysburg or Valley Forge, the Aleutian Islands Campaign claimed thousands of lives and brought World War II to the United States coast.