''Their stories were largely overlooked until...''

They were largely irrelevant. They were not ''overlooked''.

They represented 0.001666% of soldiers.

That means that to fairly ''reprensent'' them, you'd have to feature the stories of 60 000 White men, before featuring a single Sikh.

''Their stories were largely overlooked until...''

They were largely irrelevant. They were not ''overlooked''.