Lithuania's RSI Europe and Ukraine's The Fourth Law Sign MOU to Co-Produce Drones in Lithuania

Lithuanian drone manufacturer RSI Europe and Ukrainian developer The Fourth Law announced on June 18, 2026, at the Eurosatory defence exhibition in Paris that they have signed a memorandum of understanding (MOU) to jointly produce drones in Lithuania.

The agreement falls under the 'Build with Ukraine' framework and was signed by RSI Europe co-founder and CEO Tomas Milašauskas and Yaroslav Tkachuk, Director of Drone Systems at The Fourth Law.

Partnership Scope and Technology Integration

Under the terms of the MOU, RSI Europe will be responsible for establishing manufacturing facilities and scaling up production of thousands of drones using technology developed by The Fourth Law. The Ukrainian side will, subject to relevant conditions, provide drone manufacturing technology and artificial intelligence capabilities, while continuously feeding back real-world combat data to ensure products remain battlefield-ready throughout the production lifecycle. Recruitment for the production line will prioritise Ukrainian citizens.

The Fourth Law specialises in developing autonomous small drones and autonomous modules, with its core technology built around computer vision and artificial intelligence. The company was among more than 50 Ukrainian firms exhibiting at Eurosatory 2026, which ran from June 15 to 19.

"The partnership with TFL is significant — they are leaders in integrating computer vision and AI into drone control systems," said Milašauskas. "This collaboration will help strengthen Ukraine's combat capabilities and enhance modern battlefield capabilities on NATO's eastern flank."

Localising Battle-Proven Ukrainian Drone Technology

RSI Europe was founded in Vilnius in April 2022 in direct response to Russia's full-scale invasion of Ukraine. The company produces Shpak first-person view (FPV) drones and remote detonation systems that have been adopted by the Ukrainian armed forces, multiple NATO member states, and allied nations. In May 2026, RSI Europe completed its largest contract to date, delivering 9,500 Shpak systems to an undisclosed NATO buyer, with the majority of the airframes subsequently transferred to Ukraine's armed forces.

This collaboration reflects a broader trend visible at Eurosatory 2026, where European manufacturers are combining domestic production capacity with battle-tested Ukrainian technology and frontline feedback. On the same day, the United Kingdom also announced a commitment to supply 150,000 Ukraine-manufactured drones as part of an aid package totalling approximately USD 1 billion.

"This partnership under the 'Build with Ukraine' framework serves Ukraine's national interests, aiming to strengthen Ukraine's defence technology supply chain and contribute to security in Eastern Europe," said Tkachuk, adding that he was pleased to be working with a company capable of large-scale defence technology production while maintaining regular contact with Ukrainian soldiers.

The signing comes as Lithuania and its Baltic neighbours continue to call for strengthened NATO air defence capabilities, following a series of drone incursion incidents along NATO's eastern flank.

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