Context: The Ministry of Defence and the Defence Forces have been working on a cyberwarfare and defence formation for some years now. In 2007, a military doctrine of an e-military of Estonia was officially introduced as the country was under massive cyberattacks in 2007. The proposed aim of the e-military is to secure the vital infrastructure and e-infrastructure of Estonia. The main cyber warfare facility is the Computer Emergency Response Team of Estonia (CERT), founded in 2006. The organisation operates on security issues in local networks.

Question: Who have been jointly working on protection against cyberwarfare?
Answer: The Ministry of Defence and the Defence Forces

Question: What year was a declaration of e-military introduced?
Answer: 2007

Question: What event in 2007 led to a need for e-military action?
Answer: massive cyberattacks

Question: When was the Computer Emergency Response Team of Estonia established?
Answer: 2006