m battery, royal horse artillery was formed on 23 january 1809 as 2nd troop, madras horse artillery, a horse artillery battery of the honourable east india company's madras army. on 5 august 1825, it was redesignated as b troop, 1st brigade, madras horse artillery as the madras horse artillery expanded to 8 troops and was organized as two brigades. a reduction to 6 troops on 4 january 1831 resulted in the brigades being discontinued and the remaining troops lettered in a single sequence, hence becoming b troop, madras horse artillery.