To install the map:

-Extract the content of the .rar file in a folder
-Press Windows+R and type %appdata% , then press ENTER
-Select your minecraft foder
-Save "Death's duty" folder in the folder "saves"
-Save the resource pack "Death's duty (Conquest).zip" in the folder "resource packs"
-Open Minecraft
-Select "Death's duty (Conquest).zip" resource pack in options
-Play!

This map is one player only
Oh, and turn off Minecraft music when playing this map, it doesn't fit with it.
