Correct. However there is a good debate on whether or not England should leave 1 infantry as a picket in India. If you leave 1 guy, then Japan has to dedicate 2 infantry and maybe some air power to take India, which means less forces in China. If you pull the guy Japan can just walk in.
On the other hand, a full retreat might entice Japan to go hard into China leaving only one guy in India and thus allowing England to have two rounds of owning India (one round reclaiming it, one round before Japan can attack it again.)
