A new trailer for Underground, the next big expansion for Tom Clancy's The Division, was shown at Microsoft's E3 conference Monday morning.

The trailer gave players a look at some of what they will be doing in the new expansion, as well as why. A voiceover explained that The Division's enemies have regrouped in the sewer systems of New York, and are mounting an attack.The missions in Underground will be procedural. Likely this will mean that enemies and enemy types will change on each play through, but whether or not environments or the actual map will change is unclear.

[embed width="696" height="392"]https://www.youtube.com/watch?v=mBlQYBIidoM

The Division's Underground DLC will be available first on Xbox One on June 28, with PlayStation and PC getting it one month later.