Did India invade?

One of the truisms about India (spread by Swami Vivekananda, among others) is that it never invaded another country. Yet this commentary Ancient Indian Logic, from The Telegraph (Kolkata) via Sarve Samachar, ostensibly about Communist opposition to U.S.-indian joint naval exercises in southeast Asia (Malabar 07), suggests that India did spread its culture through Southeast Asia not only through commerce but also through invasion.