This post is part of our special coverage Syria Protests 2011/12.

To mark the first anniversary of the violence which accompanied the Syrian revolution, which started on March 15, 2011, a campaign is being launched to mobilise a global action for celebrities, leading Twitter users and NGOs (CIHRS, FIDH, etc.) from around the world to mount a massive call on world leaders to unite and stop the bloodshed there.

People are being encouraged to take photographs holding a sign saying “UNITE FOR SYRIA” or “STOP ONE YEAR OF BLOODSHED” in their own language and upload them on the campaign's Facebook Page. The campaign runs from Brazil to Indonesia to the Arab world and aims to generate as many reactions as possible.

On March 15, a global celebrity video will be launched, alongside the hash tag #UniteForSyria on Twitter.

In support of the global call, 50 world leaders have published an open letter in the Financial Times calling on UN Security Council members to “Unite for Syria and Stop One Year of bloodshed”.

This post is part of our special coverage Syria Protests 2011/12.