Can you recommend some doomsday novels that focus on cars, fleets, and firearms, but don't include supernatural elements?

Time stopped at eighteen for Ji Yi, and now all she wants to do is pick up from where she left off. Her career depends on it, and on top of that, she has to survive a fake marriage turned real! Some missed opportunities are irreplaceable, and some misunderstandings between them have proven near-fatal, but for He Jichen, he isn’t just a pretty face—he’s an opportunist. They may have lost their prime years together, but He Jichen is more than willing to spend his remaining years with her. If only she would just trust him… Will Ji Yi be able to find true love in this life? Can she outmaneuver all the snakes plotting her downfall? Only time will tell...

Doomsday was approaching... An ancient virus was released upon the world and from then on nothing was the same... Zombies, mutant wild animals and people with mutant powers... Jiang Liushi , one day woke up and found the Starseed, in his mind, a Black Technology which could assist him in various ways. Its most important function? Refitting and upgrading vehicles! [What? You thought it war a regular rundown minibus? Wrong! It was a Mobile Construction Vehicle (MCV) capable of massacring zombies, and everything that stood in its way, with its awesome weapons!] Follow Jiang and his MCV on the road to survival.

“Commander Lu, there are rumors that we are sleeping together, we have a fling!” He looked up from under the blanket and slowly got up. “What do you want from me?” “Deny it, say it’s fake, stop it from spreading…” He pushed her against the wall, blocking her mouth by a rough kiss. “Mrs. Lu, we have to substantiate the rumor.” Before she was born again, what she had been doing was staying away from him! After she was born again, what she always wanted to do was give him offsprings! Lu Xingzhi strived for two personal mottos his entire life: First, it was illegal to undermine military marriage. Two, Jiang Yao was his in this eternity, till death do they part.

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novel shifted to ... https://www.webnovel.com/book/you-can%27t-escape-their-love--yandere-harem(18-)_19558534906764505

"She is the one who forced me to marry her, she is also the one who pushed away ShuangAi from me, she threatened my family with her family power and all these years, she did everything to subdue me...that evil woman MuTan" MuTan can't believe what she just heard, his husband, Prince LiZouWei has such a grudge to her. The problem is she is not the real HuaMuTan, She is TanTan, LangTanTan...a simple woman who somehow be thrown into the past time and woke up as HuaMuTan. In this world, the most she loves is hero books and the most she hates is injustice. So how can she hold to all evil deeds of HuaMuTan? She cannot! TanTan decides, either she can go back to her time or not, she must fix all evil deeds that HuaMuTan did, especially to her unwilling husband. Target operation: divorce LiZouWei and make him reunite with his lover. The story will never that easy right?