Correct
兵不血刃
/ bīng bù xuèrèn /
Strokes
Definition
lit. no blood on the men's swords (idiom); fig. an effortless victory
Example
Definition
with arms innocent of blood—win a military victory without shedding a drop of blood/without firing a shot
with arms innocent of blood—win a military victory without shedding a drop of blood/without firing a shot