Then there is Andy Irvine's song Gladiators too, about the anti-conscription movement in Australia:

http://andyirvine.com/lyrics/gladiators.html

I understand the Aussies had a considerable cache of conscription songs. They seem to be universal across Europe at least. In a quick check on google, I came across:

Song type known in Romanian as 'cãtãnie' (approximate translation 'conscription' -in the village before to go into the military service, and in the army);

Greek rebetika songs on conscription and war;

Moravian folk ensemble called after its home town Bøeclav. Breclav is situated in the south of Moravia, at the border with Austria and Slovakia. It is lovely flat country, near the confluence of the rivers Morava and Dyje, the country of the vine, which stimulates both the nostalgia of long slow songs and the hot temper of lively conscription songs.