Territorial means having to do with a territory or a specific area that is claimed or defended by an individual, animal, or group. It refers to the behavior of protecting and asserting control over a particular space or land. Full definition
Dogs are often valued for this level of territorial behavior. (pets.webmd.com)
It can be very hard to regulate anything in international waters, but studies show that buffer zones in territorial waters could help. (treehugger.com)
Given the extraordinary events in the region over the last few months, the focus became Ukrainian territorial integrity. (blog.politics.ox.ac.uk)