2 haud gravate = without reluctance (ungrudgingly). Compare Sallust’s description of Marius and Sulla.
4 aequales = competitors, lit. well-matched.
comiter facilis = he was courteously good-natured.
6-7 pro re = to suit the occasion.
9 artibus iisdem = in the same spirit.—Weissenborn.
11 prosecutus = welcoming, lit. attending.
12-13 cum . . . gradum = with whom he happened to engage. Cf. collato pede = fighting foot to foot.
15 stant obnixi = stand their ground firmly. obnixus (ob + nitor, strive + against), resolute.
23 Samnis, nom. sing.
capi, occidi, Historic Infinitives.