Operation Outbreak is a map featured in the Battlefield 4: Community Operations expansion that was released in October 2015.
The map is set in the Harau Valley of Indonesia, where a chemical warfare research facility is located. Monkeys that were being used as test subjects escaped the facility and caused a panic within the valley, and with information of the incident reaching Chinese and American intelligence, PLA and USMC units are deployed to the valley to seize the research.
Operation Outbreak is name of the Community Map Project, with its layout and design based on poll results and feedback gathered from the Battlefield community through the Community Test Environment.
Credit to the author, who you should follow on Twitter, and who also happens to be a member of our forum! @Notashamedgaming
I played a ton of hours on this map, as it was one of my favourites.