Usage: 3 forms in 6 verses
Form Translated As     In Verse(s)
σύστρεμμα a confederation LXX.Num.32.14LXX.2Kgs.14.19LXX.2Kgs.15.30
confederation LXX.2Sam.15.12
συστρεμμάτων of confederation LXX.2Sam.4.2
συστρεμμάτον of confederation LXX.1Kgs.11.24

Liddell-Scott-Jones

σύστρεμμα (sustremma) a confederation G:N

σύστρεμμα, ατος, τό,

anything twisted up together: hence,

__1 globe, ball, ἐξ ἐρίου [Refs 2nd c.AD+]; ἐρίου [Refs 4th c.AD+] see at {σπεῖο; συστρέμματα} round drops of water, [Refs 4th c.BC+]
__2 body of men, crowd, concourse, [Refs 2nd c.BC+]; band, company, [LXX]; especially corps of [Refs]lightarmed (= [Refs 1st c.BC+]; of ἔφηβοι, [Refs]συστρεμμᾰτάρχης, ου, , title of 4 ἔκτακτοι attached to an ἐπίταγμα τῶν ψιλῶν (compare ἐπιξεναγός), [Refs 1st c.BC+]; and συστρᾰτηγ-αρχέω, [Refs]
__3 tumour, [Refs 5th c.BC+]
__3.b concretion in the motions, [Refs 5th c.BC+]

LSJ Scripture Refs: LXX.2Kgs.4.2