This chapter examines some of the ways in which the weak states can strengthen themselves by obtaining power from external sources. It explores the relationship between weak states and great powers on the model of patron-client relationships. In the post-colonial, post-imperial world, in which international conduct is increasingly governed by democratic-egalitarian-liberal norms, the dangers for a weak state entering an alliance with a great power have considerably declined. Although weak states can achieve much in the conduct of foreign policy through the mobilization of internal sources, their relatively low strength potential clearly limits their maneuverability. The simplest and most common way for weak states to commit a great power to support their interests is to make the great power sign a formal defense treaty with them, or to give clear, unambiguous promises of support in case of military attack. The psychological problems of identity can be found in the background of all patron-client relations.