marching money, n. — Green’s Dictionary of Slang

marching money n.

[19C milit. jargon, money used to pay for a soldier’s meals during a march]

(Aus.) daily travel allowance.

[1855		Adelaide Obs. 19 May 8/6: No. 3. On this occasion the Force will be allowed the marching money provided for by the Act].
1941		Baker Popular Dict. Aus. Sl. 46: Marching money, money to travel.
1945		Baker Aus. Lang. 142: marching money, Money for travelling.
1962		R. Cook Crust on its Uppers 28: There were no wages — hardly marching money, even.