The phrase "territorial expansion" refers to the act of a country or state acquiring new land or territory, usually by force or negotiation, in order to increase its own size or influence. Full definition
Highly skilled in defining and launching new multi-million dollar products and services using a strategic market development approach that aligns territorial expansion with operational capacity and revenue expectations. (members.climber.com)
This task will be rendered more difficult by economic crisis and the international limitations to territorial expansion in eastern Ukraine. (blog.politics.ox.ac.uk)