Hello, author here bearing a disclaimer to present.

*Note* This fan fiction story will probably not make sense/be interesting if you do not have a good grasp on World war 2 Japanese history, as I will (attempt) to portray Japan in a way that resembles its real world counter-part and thus, will create the plot assuming the reader also possesses knowledge on the topic.
Furthermore, the plot will be created with Japan as its main focus. Therefore, the chapters will mainly focus on the Japanese side of the plot. If you are not interested in more RWBY centric stories, You most likely will not enjoy this story.

If you still want to read this but do not possess enough of background knowledge on Japan at the time, please contact me in the comment section or DM. I may add a separate chapter to explain the situation of Japan portrayed here. If there is any part that you have questions on, please ask me in the comment section. I am happy to respond.
If you do find anything in this fan fiction that you find odd / not fitting, please ask me in the comments. I am fairly new to this fan fiction stuff, but I will answer to the best of my capabilities. I strive to improve this story.

Finally, please enjoy and leave a comment if you like it! Thank you for clicking on this!

=REMNANT=

The second semester of beacon academy begins, and team CFVY is sent on a mission by Ozpin while Cinder and her group begins planning out the infiltration of the Valian CCT tower.

=EARTH=

1942 June 29 - The empire of Japan and its sphere of influence suddenly vanish from the earth and are carried to the world of Remnant in a flash of white light, A night before the attack on mid-way commenced.

The entirety of Asia vanishes from the face of earth, with the Soviet Union, Australia and British India and so forth disappearing in their respective directions.

The imperial headquarters soon loses contact with navy submarines and merchant ships operating out-side of Asia, as well as much of their skilled spies who resided in the United states.

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1942 June 30th - As the government realizes the absence of other nations, a state of emergency is quickly declared in the mainland in order to halt the spread of information. Taking this as an opportunity, Tojo-Hideki orders the kenpeitai to raid hundreds of locations among the desolate streets of Tokyo, purging known communist cells and political rivals against Tojo in a bid to further solidify his position in the military and government. The damage is kept at a minimum, as the emperor steps in hours after it starts and forces Tojo to back down in his reign of terror by threatening to put him into the reserve.

However, the damage had already been done by the time Tojo stood down. Internal factions of the government, navy and army who had lost many core members, further deepen their extremism in their beliefs.

Meanwhile, the kido-butai sent to Midway under vice-admiral Nagumo reappears at Tokyo. Command instructs the fleet to dock at Sendai for the time being and for admiral Nagumo to come in and explain him self. After a heated talk between the vice-admiral and navy command, Nagumo is tied down in Tokyo, closely monitored by the armed guards belonging to the praetorian division.

On the front-lines of the pacific, all military operations stop in their tracks as they just find the ocean where there used to be front lines and find no enemy planes or ships to engage and sink.
Confused by this, frontline armies contact Tokyo for answers, causing command to puncture by the sheer volume and as a result, paralyzing Japanese operations with in the pacific for two weeks.

Meanwhile, on the continental front, PLA guerrillas and Kuomintang forces hold the line against the IJA in a bloody conflict of extinction. Even after allied support stops due to the mysterious transportation of Asia, Chinese forces keep to the hills and rural area, sustaining them-selves through routine raids against Imperial convoys.
In response, the Japanese bomb suspected resistance hubs with mustard gas to thin their numbers and break morale. Yet it proves in effective, as PLA morale holds regardless to Japanese operations while the Kuo-mintang continues to forcibly conscript anyone they can get their hands-on.

The asian hell-storm of steel, mud and blood continues, regardless of the world.

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1942 July 2nd - As a response from the confusing reports from the front lines and borders, The navy sends "type two" aircraft, while the army sends modified "type one hundred" transport planes with varying degrees of success.

The navy air service's scouting crafts go dark after discovering two completely new continents, one a mostly inhospitable desert and another with distinct yet alien purple colored soil. While speculations spurred up on where the scouting crafts went, they were ultimately dismissed by navy minister Yoneda, deeming it to be a non-issue compared to the more pressing matters at hand, such as the Pacific war and the location of the U.S naval fleet. Subsequently, the incident is largely ignored by the rest of the navy.

Meanwhile, the army air service's scouting crafts also go dark after relaying back to command of the existence of a city of unknown allegiance or origin. Subsequently, the army command is led to believe that the reconnaissance vessel had been shot down by the city. Tojo is alerted and intrigued at the news of the mysterious city, and the assembling of a collection force begins in a hurry under his order, while army-officials go to the imperial palace for emperor showa's approval.
They are ultimately successful as they receive his reluctant go ahead after a four-hour-long persuasion session.

Yet, due to manpower shortages caused by the many, newly formed occupation forces and the sheer scale of the operation to begin with, The army is forced to discuss this matter in Tokyo with the navy and government.

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1942 July 6th - From the naval city of Sendai, the first fleet under vice-admiral Nagumo sets sail for the mysterious city, with the kido-butai following closely behind due to concerns raised by the navy, mainly regarding attacks from U.S ships. Along the fold is the amphibious-assault ship IJA "Akitsu-maru", carrying colonel Hattori and newly appointed delegate and government observer, Shigeru Yoshida.

While the operation was set into motion, the Imperial headquarters comes out of their puncture by relocating much of the resources in the south-pacific to the Chinese front, leaving relatively small garrison divisions behind in the south-pacific.
As a result, the Chinese front barely moves by the newly arriving exhausted soldiers.
Meanwhile, resistance movements spring-up in many former nations of the south-pacific.
General staff is commanded to, quote, "Fix the mess in a timely, resource efficient manner that resolves all the problems".