European countries are ramping up efforts to enhance energy security amidst Russian aggression by investing in green hydrogen initiatives. The Nordic-Baltic Hydrogen Corridor project aims to connect Baltic states like Lithuania, Latvia, and Estonia with key European countries using green hydrogen platforms. These efforts support the European energy transition towards renewable resources. Despite the high cost of green hydrogen compared to natural gas-derived hydrogen, countries like Germany, France, and the UK are forging ahead with green hydrogen networks to reduce reliance on conventional fossil fuels. Initiatives to lower production costs include the development of low-iridium catalysts, cost-effective renewable energy solutions, and innovative hydrogen extraction technologies. The integration of green hydrogen with e-fuels production is expanding, with research advancements in sustainable liquid fuel production from water sources. Additionally, European countries are taking steps to enhance energy independence by decoupling from the Russian electricity grid and synchronizing with the Continental Europe Network. Efforts to safeguard energy infrastructure against hybrid attacks, including undersea cable damage, are being prioritized to mitigate vulnerabilities. The convergence of green hydrogen with defense strategies and energy security measures underscores its pivotal role in Europe's sustainable energy future.