# battlesfordelhi .... Continuous pressure on the Indian frontier from North West As said in my previous blogs there was constant pressure from late 4th century BC starting with the invasions of Alexander on north West India. Then came Seleucid invasions. After the Maurya imperial rule came Indo Greek and Shaka and Kushana invasions. After the consolidation of a pan Indian empire, the Gupta empire came the Hun invasions which too were repelled. There was a brief period of consolidation again under Harshvardhana in the first half of 7th century AD but his empire fell apart. This also coincided with the rise of an Islamic Arabic empire in the Gulf area which started expanding aggressively conquering Egypt and the Levant in Middle East. This was in the first half the 7th century AD. The Arab armies conquered a Zoroastrian Sassanid Persia between 633 AD and 654AD. They had also conquered Bahrain and Oman by 630 AD. These conquests brought them to the borders of India. There from the Gul