One who fights under the same standard as another; a companion-in-arms.
152634. Tindale, Phil. ii. 25. I supposed it necessary to sende brother Epaphroditus vnto you, my companion in laboure and felowesodier, youre Apostle, and my minister at my nedes.
1593. Shaks., 3 Hen. VI., IV. vii. 70. Come, fellow Souldior, make thou proclamation.
1777. W. Robertson, Hist. Amer. (1783), II. 244. The measure seemed to be taken with unanimous consent; such as secretly condemned it being obliged to join in the acclamations, partly to conceal their disaffection from their general, and partly to avoid the imputation of cowardice from their fellow-soldiers.
1881. James Taylor, Sc. Covenanters, 161. He [Paton] was conveyed by his captors to Edinburgh, where he met with his former fellow-soldier, General Dalziel.