Flashback…
It was yet another of Yukari's 'reconnaissance' missions to Pravda. However, this was for a different purpose; this was for machinations of higher importance for Yukari...even higher than tankery. Both her teammates and Pravda would be none the wiser.
Yukari crept through the air vent, as quiet as ever. She'd been here before so the little commander's room was easy to find. She was not there.
Perfect, Yukari thought.
She slips in as quietly as possible and leaves a note on Katyusha's nightstand, slipping out immediately afterwards, totally undetected.
A few minutes later, Katyusha entered her room and sat on the side of her bed. She had just gotten off the phone with Miho, regarding the details of the upcoming friendly match. Her crewmember, Yukari was sick and she wasn't feeling too well herself, so she would act as a loader in her tank and the new vice-commander would command the tank. With that said, she would still jointly lead Ooarai's team alongside him.
Katyusha then spots an envelope on her nightstand and picks it up.
The back of the envelope reads:
Katyusha,
Read the note inside and ponder on its words. Burn it and the envelope after you do so.
She opened it and took out the letter.
It reads:
"In order to repeat history during war, face an opponent ignorant of the history of his allies'." - A friend
She did exactly what the letter instructed her to do: she burned both items in her fireplace and proceeded to think about what the letter said.
Hmm. That's it. I'll use the same tactic that was used on my team. He'll never suspect it since he's unaware of what happened last year: I'll lure him straight to Nonna. I'll create a maze of buildings and road blocks. She'll be waiting close to a corner. Nonna rarely misses anyway, but it's best to not take chances. He'll be crying about how badly he lost after tomorrow.
As Yukari returns home, she thinks to herself: Miho was getting far too close to that boy. He was ruining her chances with her and he had to go. He would die in a simple accident during a match, just as planned. No investigation needed. Just an accident partly due to his "heads up" style of tank commanding.