Key Takeaways from the ISW: Ukrainian President Volodymyr Zelensky sent an open letter to Russian President Vladimir Putin on June 4 proposing an immediate ceasefire along the current frontline and a face-to-face bilateral meeting in a third country to end the war. Russian officials continued to ignore the economic problems and fuel shortages that Russia is facing at the St. Petersburg International Economic Forum (SPIEF) and instead presented a facade of economic stability. The Russian Ministry of Defense (MoD) demonstrated a new battle management information system for Russian forces operating in Ukraine that Russia will likely deploy with international exercise partners during Russia’s Center 2026 strategic command-and-staff exercise in September. Neither Russian nor Ukrainian forces made confirmed advances throughout the theater in the past day. Ukrainian forces continued their long-range strike campaign against Russian military infrastructure in Russia on June 4. Russian forces launched one Iskander-M ballistic missile and 293 drones against Ukraine overnight. JOIN US ON TELEGRAMFollow our coverage of the war on the @Kyivpost_official. See the original here.