Reciprocatory

[…] in the year 1725, the emperor Charles having acknowledged Philip as king of Spain and of the Indies, his catholic majesty guaranteed the Ostend East India Company, among other reciprocatory concessions.

Source: wiktionary

The reciprocatory principle of equal securities—equal rights, is the one to which the Catholic inhabitants of this [Würtemberg] and other Protestant States in Germany submit, without being taught to call it a violation of the discipline of the church.

Source: wiktionary

1886, Benjamin Perley Poore, Perley’s Reminiscences of Sixty Years in the National Metropolis, Tecumseh, MI: A.W. Mills, Volume 2, Chapter , p. 477, In the evening the Ancient and Honorable Artillery attended a special reception at the White House, reciprocatory of courtesies extended by the corps to President Arthur, one of its honorary members.

Source: wiktionary

The conscience-stricken pillar of beautiful muscle—who could have easily killed both his assailants at one blow—not only offered no reciprocatory violence but refused even to defend himself.

Source: wiktionary