Defence group sweeteners grow to $75bn

Side deals gain increasing role in securing big contracts

Offset deals spark calls for transparency

Defence groups face pressure to self regulate their sweeteners

Q&A: What are offsets?

Defence groups in deals unrelated to their day-to-day business

Defence chiefs fear UAE penalties

Concern over deals exposing companies to millions of dollars

Turkey’s defence efforts pay off

Deal with China threatens relations with US and Europe

Probes into Portugal’s submarines deal

Prosecution claims offset scheme cost Lisbon €34m

South Africa deals embroiled in controversy

Benefits from $4.8bn deal never materialised

Offsets: Methodology used in FT study

Bottom-up approach used in year-long investigation

The history of defence offsets

Timeline: How offsets have evolved since the second world war

Defence group sweeteners grow to $75bn

Slideshow: Which company has the most offset obligations and which countries are benefiting?