Commercial treaty till the middle of the century, apparently with irresistible support, they suddenly collapsed under the strain of a season of exceptionally short crops. Both their continued maintenance and their final sudden abolition are in some respects divergent from the general course of British tariff history. Commercial treaty A commercial treaty is a formal agreement between states for the purpose of establishing mutual rights and regulating conditions of trade. It is a bilateral act whereby definite arrangements are entered into by each contracting party towards the other—not mere concessions. For example, the Methuen Treaty was a commercial treaty between Portugal and
Treaty of Gulistan for the Persians and used this to strengthen their foreign affairs. Using their new-found diplomatic connections with the British, Persia established the Treaty of Defensive Alliance in 1812. This promised that Britain would “offer a defensive alliance against further Russian encroachments”. It essentially had terms stating that Persia would provide defense against any European army from entering India (which stationed a majority of British troops) and in return, Britain would provide military and financial aid in case of another Russian attack. The treaty did not answer vital questions such as whether the Persian army would be disarmed or be able