https://www.vice.com/en_us/article/5dgemn/ukraine-accuses-russia-of-using-whatsapp-bot-farm-to-ask-military-to-surrender

Ukraine’s intelligence service accused Russia of running a bot farm that sent around 5,000 text messages to local police and military members asking them to surrender and defect. 

On Thursday, the Security Service of Ukraine (SSU) announced that it caught and disrupted  the “special information operation” that was designed to “destabilize moral and psychological state of Ukrainian security forces.”