Just before this BBC podcast gets underway, here's something you may not know.

My name's Linda Davies and I Commission Podcasts for BBC Sounds.

As you'd expect, at the BBC we make podcasts of the very highest quality featuring the most knowledgeable experts and genuinely engaging voices.

What you may not know is that the BBC makes podcasts about all kinds of things like pop stars,

poltergeist, cricket, and conspiracy theories and that's just a few examples.

If you'd like to discover something a little bit unexpected, find your next podcast over at BBC

Sounds. Hello and thank you for downloading the podcast of Witness History from the BBC World Service.

This week we're marking the 50th anniversary of what became known as Bloody Sunday,

when British troops shot dead 13 demonstrators in Northern Ireland in 1972.

The deaths were a turning point in one of Europe's longest running sectarian conflicts.

But we're starting a few years earlier in 1969, when the British Army were deployed

in Northern Ireland for the first time.

Louise Hidalgo spoke to one of those soldiers and to an Irish reporter who saw them arrive.

This is the Civil Rights March now in the streets of London Dairy and as we walk along the streets

to either get cheers from people supporting the marches or on the other hand stones.

Inspired by the Civil Rights movement in the United States,

in the late 60s, the Catholics of Northern Ireland

took to the streets to try to overturn what they saw as decades of discrimination

by Northern Ireland's Protestants.

By August 1969, tensions had erupted into riots.

The other side of the street.

On August the 12th, Protestant marchers held their annual parade

...