In this topic is all of the new information gleamed from the BH6 official site. Enjoy.

DSO

1) It is not the "secret military agency" Leon originally worked for.
2) The DSO was established by Adam Benford in 2011.
3) Established as a quick response organization to protect the US from bioterrorism.
4) Agents are chosen from various government organizations.
5) Mentions the FBC but that they are not related and considerably different.
6) Sherry was with another organization before becoming an agent in the DSO, where she is immediately given her first assignment by Simmons to protect Jake.

Edonian Liberation Army

The mercenary group Jake belongs to is the "Edonian Liberation Army".

Edonia was democratized like other Eastern Europe countries in the late 1980s. Gradually, confusion was seen in its administration after 20 years. Taking advantage of this, some officers led a coup d'etat and occupied city hall. The then Prime Minister lost the nation's support and dissolved the assembly. The political party which rallied against strengthening of ties with EU countries became the dominant parrty, and the administration of Edonia gradually regained composure. However, the influences which began the coup fell into destruction with anti-government soldiers and some radicals continuing stubborn resistance.

In 2010, the country finally fell into civil war. In 2012, someone distributes the C-Virus to the anti-government soldiers of the ELA and causing the appearance of the J'avo B.O.W., leading to the intervention of the BSAA.

BSAA

The BSAA was actually established in 2004. A year later in 2005, as a result of the "Queen Zenobia Incident", they became a Special Forces governed by the UN. Fast forward to 2012, Chris, as one of the Original Eleven, is summoned upon reports of a "new species" (J'avo) come from Edonia. Later, the Far East branch is in charge of handling the biohazard in Lanshiang, but because the incident was so extensive, other branches (North America in particular) were forced to take part to support the Far East branch.

Just fully translated the DSO section on the official site. Enjoy.