Question

which is a common tactic used in proxy wars?○ encouraging opposing powers citizens to emigrate○ sponsoring wars of liberation and revolutions○ controlling another country secretly○ buying weapons in preparation for domestic warfare

Explanation:

Proxy wars involve major powers supporting smaller groups or states in conflicts without direct military engagement. Sponsoring liberation wars or revolutions aligns with this, as powers back local forces to advance their interests indirectly. Other options do not fit the core definition of proxy war tactics: emigration encouragement is unrelated, secret control is more akin to covert occupation, and domestic weapons preparation does not involve external proxy conflict.

Answer:

sponsoring wars of liberation and revolutions