History of Technology in India, Vol. I: From Antiquity to c. 1200 A.D. v1.c39.s3.9

v1.c39.s3.9

The emerging power structures and rivalries promoted technology which was meant to protect and augment the power structures in return. As the *mahājanapadas* grew in size, the national and international boundaries came under dispute and military confrontation. We find 600 B.C. mud ramparts and the use of sun-dried and fired bricks in the fortifications of this era (600-500 B.C.) at Ujjaini, Eran, Kaushambi, Rajghat etc. The iron and weapon industries flourished simultaneously. The Persians intruded into a part of north-western India, took away some gold and brass, used Indian iron-tipped arrows against the Greeks and introduced Persian punched coins (siglos) into India. Precious stone industry was set up at Śrāvastī.