There is an idiom called "what is a horse, what is a soldier"

Feed the horse to sharpen the knife ―― Prepare for the war

[Pinyin]

Liu bangming

[Interpretation]

Li: grinding with "Li"; Soldiers: weapons; Feed animals. Sharpen weapons and feed horses. Describe preparing for battle.

[source]

"Zuo Zhuan" Xi Gong thirty-three years: "Zheng Mu, a minister, visited the guest house, and the three armies and horses."

[example]

In Sichuan, powerful brands such as Duocai, Fish, Ding, and Golden Koala are fully preparing for the war this year, and they have shown their secret weapons one after another.