diff --git a/calefaction/eve/universe.py b/calefaction/eve/universe.py
index 3f38bcb..6c14060 100644
--- a/calefaction/eve/universe.py
+++ b/calefaction/eve/universe.py
@@ -7,6 +7,18 @@ import yaml
 
 __all__ = ["Universe"]
 
+def _cache(func):
+    """Wrap a no-argument method to cache its return value in the object."""
+    def inner(self):
+        key = func.__name__
+        if key in self._cache:
+            return self._cache[key]
+        value = func(self)
+        self._cache[key] = value
+        return value
+    return inner
+
+
 class _UniqueObject:
     """Base class for uniquely ID'd objects in the universe."""
 
@@ -14,6 +26,7 @@ class _UniqueObject:
         self._universe = universe
         self._id = id_
         self._data = data
+        self._cache = {}
 
     @property
     def id(self):
@@ -30,11 +43,13 @@ class _SolarSystem(_UniqueObject):
         return self._data["name"]
 
     @property
+    @_cache
     def constellation(self):
         """The solar system's constellation, as a _Constellation object."""
         return self._universe.constellation(self._data["constellation"])
 
     @property
+    @_cache
     def region(self):
         """The solar system's region, as a _Region object."""
         return self._universe.region(self._data["region"])
@@ -50,6 +65,16 @@ class _SolarSystem(_UniqueObject):
         return tuple(self._data["coords"])
 
     @property
+    @_cache
+    def gates(self):
+        """The solar system's adjacent systems, via stargate.
+
+        A list of _SolarSystem objects.
+        """
+        return [self._universe.system(sid) for sid in self._data["gates"]]
+
+    @property
+    @_cache
     def faction(self):
         """The solar system's faction, as a _Faction object, or None."""
         if "faction" in self._data:
@@ -86,11 +111,13 @@ class _Constellation(_UniqueObject):
         return self._data["name"]
 
     @property
+    @_cache
     def region(self):
         """The constellation's region, as a _Region object."""
         return self._universe.region(self._data["region"])
 
     @property
+    @_cache
     def faction(self):
         """The constellation's faction, as a _Faction object, or None."""
         if "faction" in self._data:
@@ -112,6 +139,7 @@ class _Region(_UniqueObject):
         return self._data["name"]
 
     @property
+    @_cache
     def faction(self):
         """The region's faction, as a _Faction object, or None."""
         if "faction" in self._data:
@@ -132,6 +160,16 @@ class _Faction(_UniqueObject):
         """The faction's name, as a string."""
         return self._data["name"]
 
+    @property
+    @_cache
+    def territory(self):
+        """The faction's controlled territory.
+
+        A list of _SolarSystems.
+        """
+        return [system for system in self._universe.systems()
+                if system.faction and system.faction.id == self.id]
+
 
 class _Type(_UniqueObject):
     """Represents any type, including ships and materials."""
@@ -194,7 +232,8 @@ class _DummySolarSystem(_SolarSystem):
             "constellation": -1,
             "region": -1,
             "security": 0.0,
-            "coords": (0, 0, 0)
+            "coords": (0.0, 0.0, 0.0),
+            "gates": []
         })
 
 
@@ -325,6 +364,12 @@ class Universe:
             return _DummyConstellation(self)
         return _Constellation(self, cid, self._constellations[cid])
 
+    def constellations(self):
+        """Return an iterator over all _Constellations."""
+        self._load()
+        for cid in self._constellations:
+            yield self.constellation(cid)
+
     def region(self, rid):
         """Return a _Region with the given ID.
 
@@ -335,6 +380,12 @@ class Universe:
             return _DummyRegion(self)
         return _Region(self, rid, self._regions[rid])
 
+    def regions(self):
+        """Return an iterator over all _Regions."""
+        self._load()
+        for rid in self._regions:
+            yield self.region(rid)
+
     def faction(self, fid):
         """Return a _Faction with the given ID.
 
@@ -345,6 +396,12 @@ class Universe:
             return _DummyFaction(self)
         return _Faction(self, fid, self._factions[fid])
 
+    def factions(self):
+        """Return an iterator over all _Factions."""
+        self._load()
+        for fid in self._factions:
+            yield self.faction(fid)
+
     def type(self, tid):
         """Return a _Type with the given ID.
 
diff --git a/calefaction/modules/map.py b/calefaction/modules/map.py
index dc20547..4b6e343 100644
--- a/calefaction/modules/map.py
+++ b/calefaction/modules/map.py
@@ -25,10 +25,18 @@ def mapdata():
         "galaxy": {
             system.id: {
                 "name": system.name,
+                "security": system.security,
                 "coords": system.coords,
-                "security": system.security
+                "gates": [dest.id for dest in system.gates],
+                "faction": system.faction.id if system.faction else -1
             }
             for system in g.eve.universe.systems() if not system.is_whspace
+        },
+        "factions": {
+            faction.id: {
+                "name": faction.name
+            }
+            for faction in g.eve.universe.factions() if faction.territory
         }
     }
     resp = app.response_class(response=json.dumps(payload), status=200,
diff --git a/scripts/import_sde.py b/scripts/import_sde.py
index 8253004..276161a 100755
--- a/scripts/import_sde.py
+++ b/scripts/import_sde.py
@@ -152,7 +152,9 @@ def _build_galaxy_skeleton(ids, names):
             "name": names[sid],
             "constellation": -1,
             "region": -1,
-            "security": 0.0
+            "security": 0.0,
+            "coords": [0.0, 0.0, 0.0],
+            "gates": []
         }
 
     print("done.")
@@ -181,6 +183,16 @@ def _load_assoc_for_system(galaxy, system, rid, cid):
         assert facid >= 0
         galaxy["systems"][sid]["faction"] = facid
 
+    galaxy["systems->stargates"][sid] = []
+    for sgid, gate in data["stargates"].items():
+        dest = gate["destination"]
+        assert isinstance(sgid, int)
+        assert isinstance(dest, int)
+        assert sgid >= 0
+        assert dest >= 0
+        galaxy["systems->stargates"][sid].append(dest)
+        galaxy["stargates->systems"][sgid] = sid
+
 def _load_assoc_for_constellation(galaxy, constellation, rid):
     data = _load_yaml(constellation / "constellation.staticdata")
     cid = data["constellationID"]
@@ -221,9 +233,19 @@ def _load_assoc_for_region(galaxy, region):
 
         _load_assoc_for_constellation(galaxy, constellation, rid)
 
+def _load_gate_info(galaxy):
+    sys2gate = galaxy["systems->stargates"]
+    gate2sys = galaxy["stargates->systems"]
+
+    for sid, gates in sys2gate.items():
+        galaxy["systems"][sid]["gates"] = [gate2sys[gate] for gate in gates]
+
 def _load_galaxy_associations(sde_dir, galaxy):
     print("Loading galaxy staticdata... ", end="", flush=True)
 
+    galaxy["systems->stargates"] = {}
+    galaxy["stargates->systems"] = {}
+
     univdir = sde_dir / "fsd" / "universe"
     for base in univdir.iterdir():
         if not base.is_dir():
@@ -235,7 +257,9 @@ def _load_galaxy_associations(sde_dir, galaxy):
 
             _load_assoc_for_region(galaxy, region)
 
-    print("done.")
+    _load_gate_info(galaxy)
+    del galaxy["systems->stargates"]
+    del galaxy["stargates->systems"]
 
     for cid, constellation in galaxy["constellations"].items():
         if constellation["region"] < 0:
@@ -246,6 +270,8 @@ def _load_galaxy_associations(sde_dir, galaxy):
         if system["region"] < 0 or system["constellation"] < 0:
             print("[WARNING] Orphaned system: %d=%s" % (sid, system["name"]))
 
+    print("done.")
+
 def _load_factions(sde_dir):
     print("Loading factions... ", end="", flush=True)