the outbreak of war
開戦する
open war [hostilities] 《against》
読み方 かいせん
The outbreak of war; the declaration of war; the commencement of hostilities:(=する) to open hostilities; to declare war (on a power)
開戦を宣言する
開戦の宣言
the Japan-China War
the war machine
Everybody was stirred by the declaration of war.
The tide of war has turned.
Success or failure is incidental to warfare.