After the first round of the Romanian presidential vote, Romanian intelligence said that Georgescu's sudden jump in popularity was due to a "highly organised" and "guerrilla" social media campaign, from accounts sending identical messages.

Now Romanian intelligence says his sudden and surprise surge in popularity is down to a "highly organised" and "guerrilla" campaign on social media, sharing identical messaging and using influencers.

A piece of guerrilla art appeared at Los Angeles’ MacArthur Park this week, underlining the park’s reputation as a center of drugs, addiction and despair.

For more than six years, there has been a guerrilla war in Cameroon between government forces and insurgents who want certain parts of the country to become an independent state.

Most of Ireland ultimately became an independent state in 1922, after several years of bloody guerrilla warfare.