In October 2005 Drools was federated into JBoss as part of their JEMS offering and rebranded "JBoss Rules", in 2006 JBoss itself was acquired by Red Hat.
Drools was federated into JBoss as part of their JEMS offering. This was in 2006 JBoss. This was in October 2005. Drools was rebranded "JBoss Rules". This was in 2006 JBoss. This was in October 2005. Itself was acquired by Red Hat 2006 JBoss.