Absent rather than dead comrades, but could be read that way at a push:

The Outside Track by Henry Lawson

There were ten of us there on the moonlit quay,
And one on the forward hatch.
No straighter mate to his mates than he
Ever said, "Old Len's a match!
'Twill be long, old man, ere our glasses clink,
"Twill be long, ere we grip your hand,"
So we dragged him ashore for a final drink
And the whole wide world looked grand

Chorus:
      For they marry and go,
      As the world rolls back,
      They marry, and vanish and die,
      But their spirits shall live on the outside track
      As long as the years go by.

The port lights glowed in the morning mist
As it rolled on the waters green,
And over the railing we grasped his fist
As the dark tide came between.
We cheered the captain, we cheered the crew
And our mate, times out of mind.
We cheered the land he was going to
And the land he had left behind.

Chorus

We roared "Lang Syne" in a last farewell
But my heart felt out of joint.
I well remember the hush that fell.
As the steamer passed the point.
We drifted home through the public bars,
We were ten times less by one
Who sailed out under the morning stars
And under the rising sun.

Chorus

Then one by one, and two by two
They've sailed from the wharf since then.
I've said goodbye to the last I knew,
The last of the careless men.
And I can't but think that the times we had
Were the best times after all,
As I turn aside with my lonely glass
And drink to the bar-room wall.

Chorus
      So I'll try my luck
      For a check Outback
      And a last farewell to the bush
      For my heart's away on the Outside Track
      At the back of the steerage push.