Akhenaten
Heretic Pharaoh
One group who do often get overlooked in this campaign are the Indian troops. Although they were not put on the line very much, they suffered horendous losses in their logistics roles.
Yes, this group have been largely overlooked, however, Bruce the Thread™ overlooks nothing and will now correct this situation.

There's a bit more detail to add to your statement above about the Indians having a logistic rather than fighting rôle at Gallipoli.
The only Indian formation to fight in the Gallipoli campaign was the 29th Indian Brigade. They arrived on the peninsula on 1 May 1915.
from:
The History of British India: a chronology
By John F. Riddick
Published by Greenwood Publishing Group, 2006
ISBN 0313322805, 9780313322808
(This is from a really, truly book, so no linkies I'm afraid)
page 98 said:26 Apr. 1915. The 29th Indian Brigade left Egypt for action at Gallipoli, landing at Cape Helles on May 1. The Brigade fought almost continuously until July 10, when it was withdrawn for relief and refitting.
7-31 Aug. 1915. The 29th Indian Brigade joined ANZAC forces in the attack on Sari Bair Ridge in an attempt to cut off the Turkish Army on the Gallipoli Peninsula from Constantinople. With the operation's failure, the 29th Brigade withdrew and went to Suez for a defensive assignment on the Suez Canal.
This statement misses an important development in the Gallipoli campaign.
It was only decided AFTER the arrival of the 29th Brigade that since the 69th and 89th Punjabi Battalions consisted partly of Muslims, they could not be relied upon to attack the Turks. Please note that this was a (British) command decision, and not one taken by the brave Indians soldiers themselves.
These battalions were assigned to Lines of Communication work, which reduced the fighting strength of the Brigade by a quarter.
The Battle of Sari Bair (Kocaçimentepe)
The attack from the Anzac perimeter was directed against two peaks of the Sari Bair range; Chunuk Bair and Hill 971. Under the overall command of Major-General Alexander Godley, the attacking force included the New Zealand and Australian Division, the British 13th Division plus a couple of extra infantry brigades.
The plan was for two assaulting columns to march out of Anzac on the night of 6 August. The right-hand column, comprising the New Zealand Infantry Brigade under Brigadier-General Francis Johnston, would head for Chunuk Bair. The left-hand column, commanded by Major-General Vaughn Cox, heading for Hill 971 and neighbouring Hill Q, contained the Australian 4th Infantry Brigade of Brigadier-General John Monash and Cox's 29th Indian Brigade. Both objectives were expected to be captured by dawn.
They weren't. Johnny Turk held firm, and his counter attack cleared the peninsula of enemies altogether.
Despite the loss, the battle was the setting for the famous, and tragically futile, attack of the 3rd Light Horse Brigade.
The Battle of The Nek
Captain Bean said:. . . a deed of self-sacrificing bravery which has never been surpassed in military history - the charge of the Australian Light Horse into certain death at the call of their comrades need during a crisis in the greatest battle that has ever been fought on Turkish soil . . .
Subsequent to Sari Bair, the 29th Indian Brigade also took part in the Battle of Hill 60 on 21 August, again alongside the ANZACs.
The Battle of Hill 60
With the major battle effectively lost, the British commanders turned their attention to consolidating their meagre gains. With Hill 971 out of reach, Hill 60 appeared an attainable objective. The attacking force was based on General John Monash's Australian 4th Infantry Brigade, which had spearheaded the advance on Hill 971 and had taken up positions in a gully, now known as Australia Valley, that led towards Hill 60. Also involved were the remnants of the 29th Indian Brigade, two regiments of the New Zealand Mounted Rifles Brigade (Canterbury and Otago) and three British New Army battalions.
As pointed out, however, casualties were by no means limited to the front line troops, and the losses suffered by the Indians assigned to logistic tasks were indeed horrendous. The fact is, the somewhat euphemistically named "rear" areas at Gallipoli were in many cases only yards from the actual front line.
Here are some Indian Soldiers at Gallipoli, being logistical:

Te Ara Encyclopedia of New Zealand
Indian casualties at Gallipoli were 1,358 killed and 3,421 wounded. That leaves maybe a few dozen who made it through unscathed.
These are members of the the Australian Light Horse on their Walers.

Wiki Commons
I had a bit of trouble researching this one. Any correction/additions are welcomed, as always.
Cheers,
Dave