<P> The fall of the Mauryas left the Khyber Pass unguarded , and a wave of foreign invasion followed . The Greco - Bactrian king , Demetrius , capitalized on the break - up , and he conquered southern Afghanistan and parts of northwestern India around 180 BCE , forming the Indo - Greek Kingdom . The Indo - Greeks would maintain holdings on the trans - Indus region , and make forays into central India , for about a century . Under them , Buddhism flourished , and one of their kings , Menander , became a famous figure of Buddhism ; he was to establish a new capital of Sagala , the modern city of Sialkot . However , the extent of their domains and the lengths of their rule are subject to much debate . Numismatic evidence indicates that they retained holdings in the subcontinent right up to the birth of Christ . Although the extent of their successes against indigenous powers such as the Shungas , Satavahanas , and Kalingas are unclear , what is clear is that Scythian tribes , renamed Indo - Scythians , brought about the demise of the Indo - Greeks from around 70 BCE and retained lands in the trans - Indus , the region of Mathura , and Gujarat . </P>
<P> The fall of the Mauryas left the Khyber Pass unguarded , and a wave of foreign invasion followed . The Greco - Bactrian king , Demetrius , capitalized on the break - up , and he conquered southern Afghanistan and parts of northwestern India around 180 BCE , forming the Indo - Greek Kingdom . The Indo - Greeks would maintain holdings on the trans - Indus region , and make forays into central India , for about a century . Under them , Buddhism flourished , and one of their kings , Menander , became a famous figure of Buddhism ; he was to establish a new capital of Sagala , the modern city of Sialkot . However , the extent of their domains and the lengths of their rule are subject to much debate . Numismatic evidence indicates that they retained holdings in the subcontinent right up to the birth of Christ . Although the extent of their successes against indigenous powers such as the Shungas , Satavahanas , and Kalingas are unclear , what is clear is that Scythian tribes , renamed Indo - Scythians , brought about the demise of the Indo - Greeks from around 70 BCE and retained lands in the trans - Indus , the region of Mathura , and Gujarat . </P>
who invaded south asia and set up a state following the mauryan period
who invaded south asia and set up a state following the mauryan period
The Greco - Bactrian king , Demetrius
The Greco - Bactrian king , Demetrius