Accoring to Revelation 9,
"..(Verse 16): And the number of the army of the horsemen [were] two hundred thousand thousand: and I heard the number of them. (Verse17)And thus I saw the horses in the vision, and them that sat on them, having breastplates of  fire, sapphire, and brimstone.."

Some evangelists said that apocalypse army of 200 millions came from China(Honestly I'll be elated if china is economically strong enough to support such a huge army) mainly because china is the most populous country on Earth. But there's a number of problem:1)Indian population will exceed china's within a few years 2)China obviously doesn't have 200 millions horses. There're other more likely possibilities:

1)Those are cow mounted hindus. India has 350-400 million holy cows;they can definitely spare 200 million cows. Saint John the Divine had  slightly blurred prophetic vision.   ".. fire, sapphire, and brimstone" could be an impression of the hindutwah colour  of 'saffron' .

 Logistically,historically and geographically, India is a lot closer to the middle east and has good motive. Mind you the first pogrom against Cow worshipper was carried out by Moses and Aaron dring Exodus. What sweet revenge !!

2)More likely, those 200 millions were actually 3rd Worlders/hispanics who want to migrate to USrael. Exactly what's happening RIGHT NOW !!! That State of Israel in Middle East is not exactly a tempting place to occupy for the gentiles but N. America USrael is !!

3)Yes,you guess it right, Jihadist invasion of USrael; camels were mistaken as horses