ISIS is losing territory on all fronts - here's what the group leaves behind

There's no question that ISIS forces are losing ground in territories in Syria and Iraq - after making so many enemies from several countries and across numerous ethnic lines, the group might have bit off more than it could chew.

Forces seem to be losing territory so fast that they resorted to tactics such as kidnapping civilians to form a "human shield" during hasty retreats.

And the death of ISIS spokesman Abu Muhammad al-Adnani this week will likely hasten problems within the group. Adnani helped spur recruitment for the group, as well as planned external operations.

Images taken of abandoned ISIS strongholds in Syria and Iraq suggest that the trove of valuable intelligence materials left behind, such as ordnance components, could be analyzed by experts to thwart ISIS in the future.

Here's what its safe houses in Syria and Iraq looked like: