Quick chime in regarding arms supply post cuban missile and 1962 Sino-China War: While US and UK definitely gave arms to India, they refused to supply advanced machinery and weapons. This is where the Soviets were glad to step in, and henceforth was one of the major reasons why in the latter half of the Cold War the India sort of allied with the Soviets; while the NATO block in general sided with Pakistan (whose really close ally was also China).