Alliances do not end espionage between allies. Discuss with reference to Cold War cases and present-day intelligence-sharing frameworks.

Alliances pool intelligence against a common adversary, but each partner keeps its own national interest. Allies therefore watch, lobby and sometimes subvert one another. The pattern runs from Cold War client states to today's intelligence-sharing compacts.

Cold War cases: allies spying on their patron

• South Korea (KCIA): in 1976 it was accused of spying on Korean and American nationals in the U.S. and of bribing Congressmen to sway U.S. defence and foreign policy [1].
• Policy target: former Defence Secretary Melvin Laird disclosed that this lobby had tried to undermine the Nixon Administration's 1970 decision to withdraw 20,000 U.S. troops from Korea [1].
• Iran under the Shah: although Iran was a close U.S. ally, its agents tracked Iranians living in the U.S., and the Shah himself admitted it [1].
• Host response: Congress investigated instead of looking away. House ethics inquiries into "Korean influence" followed in 1977–78 [3]. The Church Committee had already opened U.S. intelligence to scrutiny by the legislature in 1975 [2].

Present-day frameworks: sharing without full trust

• Five Eyes (U.S., U.K., Canada, Australia, New Zealand) is the deepest sharing compact. Even so, it keeps a separate council of national oversight bodies, the FIORC [4].
• Surveillance of partners: after the NSA revelations, the European Parliament (2014) condemned mass surveillance inside EU states, including cooperation between Germany's BND and the NSA. It also asked about an EU-wide "no-spy" arrangement [5].
• India–U.S.: BECA (2020) allows the two countries to share geospatial intelligence [6]. Deeper access, however, makes counter-intelligence more important.
• Legal shields: the U.S. FARA (1938) requires agents of any foreign government, allied or not, to register with the Justice Department [7].

Why espionage persists

• Allies' interests diverge on troop levels, trade and technology.
• States hedge against future realignment and want to verify what partners tell them.
• The line is crossed when collecting information turns into covert influence over legislatures or diasporas. That is closer to corruption than to intelligence work.

Alliances therefore change the form of espionage, not the fact of it. As India deepens partnerships such as BECA, it should add a foreign-lobbying register, parliamentary oversight of intelligence and strong counter-intelligence. Cooperation can then reinforce strategic autonomy instead of compromising it.