This article uses data for the period 1816-1992 to test hypotheses reg
arding the occurrence and repercussions of arms control agreements (AC
As). In particular, it evaluates the extent to which the ACAs are asso
ciated with a significant transformation of the international environm
ent. It establishes that agreements that restrict the level of arms te
nd to be introduced in periods of military buildup decelerations, but
fail to be accompanied by lower military spending patterns beyond the
short run; and that agreements are followed by a significant decrease
in the frequency of international conflict.