- Boeing once wanted to buy a stake in Embraer's C-390 Millennium military aircraft.
- The $4.2 billion joint venture aimed to boost Boeing's market reach and Embraer's resources.
- The deal fell through in 2020 and left Boeing without a competitor to Lockheed's C-130 Hercules.
Boeing doesn't have an answer to US aerospace company Lockheed Martin's C-130 Hercules military plane — but it used to.