I rolled two games where Germany buys a Major IC on turn one.
First game, UK bought an IC in Egypt and a fighter for London, and US spent in the Pacific. Sealion G3 was a rout.
Second game, UK played conservative/defensively and aggressively with scrambles, and piled on the troops. US still spent in the Pacific because they’re not stacking 3 fully loaded AC’s in SZ 102 when Germany purchases a Major on turn one. This battle was a lot closer but Germany still sacked London with 4 tanks left and it’s entire air force (what was left of it - lost over half on G1 and G2. 1 SB, 3 Tac, 1 Ftr)
https://www.youtube.com/playlist?list=PLC5zN4iV9YdGilBNXv91hgvUn99pR70xu