For almost three years, many Ukrainians have been waking up to this.

The sound of missiles, explosions, drones.

These are sounds that my close family in Ukraine live with pretty much every day.

Russia's full-scale invasion of Ukraine has devastated cities and taken countless lives. But beyond the physical conflict,

another battle has been raging for information and facts. While Ukrainian official sources

have on a few occasions been criticized for making misleading statements,

Russia's digital army has rained down disinformation in Ukrainian timelines,

in an effort to undermine the nation's resolve.

In my day job covering disinformation for BBC Verify, I've witnessed the extent of the challenge.

Spreading pro-Russian disinformation about the war in Ukraine.

To find back, Ukrainians and their allies have deployed fact-checking and OSIN techniques.

Now, Osson stands for open-source intelligence.

It has become a sort of shorthand for the job of investigating publicly available

information. A lot of it is about working out what we can say from the vast amount of content

publicly posted online, especially on social media platforms like X, TikTok, and the messaging app

Telegram.

We need to constantly control, constantly monitor all of it,

so we dedicate our whole life, all our time to basically war.

Alongside fact-checking, it's been crucial in building a clearer picture of what's happening on the battlefield for journalists, politicians, and ordinary users.

But the work does take its toll.

I'll be honest, it seems to me that we all leave on the edge, on the edge of this burnout.

Welcome to the documentary from the BBC World Service. I'm Olga Robinson, and in this episode of BBC trending,

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