i dont understand (from a newbie)

in a game i was beaten because some guy in a sequential game was able to keep getting armies...i dont understand how, in one turn he gave i think 4x3 cards..in the seventh turn (!). How is this possible? Has it got something to do with whiping somebody of the map. Do u get extra cards or armies then? I played a lot of risk but this rule i have never heard of.