In this war we're always moving,  
Moving on;  
When we make a friend another friend has gone;  
Should a woman's kindly face  
Make us welcome for a space,  
Then it's boot and saddle, boys, we're  
Moving on.  
In the hospitals they're moving,  
Moving on;  
They're here today, tomorrow they are gone;  
When the bravest and the best  
Of the boys you know "go west",  
Then you're choking down your tears and  
Moving on.
Andrew Barton Paterson
http://www.poemhunter.com/poem/moving-on/