Usage: 1 form in 2 verses
Form Translated As     In Verse(s)
συνεκπολεμήσει he shall join in war with LXX.Deut.20.4
will join in making war against LXX.Deut.1.30

Liddell-Scott-Jones

συνεκπολεμέω (sunekpolemeō) to join in making war G:V

συνεκπολεμέω-πολεμέω,

vanquish together, [LXX+1st c.BC+]

LSJ Scripture Refs: LXX.Deut.1.30