Rewritten already 2 times

Criticism is accepted, please give me tips on how to make better histories (also, sorry if there's bad grammar, English isn't my native language and I'm only guiding me with the autocorrect)

The day has just started, the plants awaken up and started doing their duties, some were cooking, other we're doing their hobbies, others were guarding to make sure there are no zombies ( btw, in this history they use real life warfare tech) the officers and majors of the 3 base were preparing a plan, the zombies just recently breached the barrier that separated bases of both teams, and destroyed a base that was behind that barrier, the plan was to start bombarding the destroyed base, because they were 100% secure that the zombies we're there, hiding and preparing the minimal mistake to strike.

Sunflower just wake-up, late as always, she started to receive the medic supplies and started doing her work, she was still sad since her boyfriend disappeared in a defense, without leaving any trace, it was kinda obvious her sad face, her cold attitude and that sometimes she let escape a tear the whole day.

After some discussions and screams, the majors and officers finally come to a conclusion, they were doing it tomorrow because of the pressure of the majors of other bases, so they started preparing everyone for the assault.

But before the assault, the had to know they send some spy drones so the assault wasn't in vain, and they were right, there's were some zombies at there, the zombies that breached the barrier, it was at night to make sure they wouldn't see it and started marking the strategic points, and they send everyone to sleep, preparing for the assault the next day.