Complex sentence: Stalin addressed the nation for the first time since the start of the German invasion on 3 July, and just like Molotov's announcement, he called for a "Patriotic War... of the entire Soviet people".
Split into simpler sentences: Stalin addressed the nation for the first time since the start of the German invasion on 3 July. Just like Molotov, he called for a "Patriotic War... of the entire Soviet people".