OET interlinear HERO (JDG) 8:12

uW Translation Notes:

Note 1 topic: figures-of-speech / metonymy

וְ⁠כָל־הַֽ⁠מַּחֲנֶ֖ה הֶחֱרִֽיד

and=all (Some words not found in UHB: and,they_fled Zeⱱaḩ and,Zalmunna and,he_pursued after,them and,he_captured DOM two_of kings_of Midyān DOM Zeⱱaḩ and=DOM Tsalmunnāˊ/(Zalmunna) and=all the,army routed )

The author is speaking by association of how Gideon made the Midianite army tremble to mean that the army panicked and fled. Alternate translation: [And he threw the entire army into a panic]

Note 2 topic: figures-of-speech / events

וְ⁠כָל־הַֽ⁠מַּחֲנֶ֖ה הֶחֱרִֽיד

and=all (Some words not found in UHB: and,they_fled Zeⱱaḩ and,Zalmunna and,he_pursued after,them and,he_captured DOM two_of kings_of Midyān DOM Zeⱱaḩ and=DOM Tsalmunnāˊ/(Zalmunna) and=all the,army routed )

Since Gideon first routed the Midianite army and its kings then fled, in your translation you may wish to relate these events in the order in which they happened. You could do that by putting this last sentence first in the verse.