Collapse of Gupta :

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Introduction

After the collapse of the kushanas in the north, India was left without any great power. In the years following, India was then divided into several independent states fighting for control . Then during 320 C.E. , a new line of of kings produced a large empire that would soon reign until 535 C.E. The new empire was known as the Guptas. during their rule they established whats known as the " Golden Era" in classical Indian history. By uniting all the independents states struggling for control they formed a strong foundation which allowed the Gupta empire to give the longest period of political stability in the history of India. Despite the empire's vast and study hold on India, there were several factor such as internal conflict, foreign invasions, and the rebellion of provical governers that led to the slow decline of this strong empire.
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Causes of decline
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the Huns

The decline of the Guptas originated with the reign of Skandagupta.Since constant war depleated the empires resources plus lack of coins caused finachial drain later rulers were unable to keep Gupta authority in the provinces where feudatories and local governers fought for independence from the Buddhagupta reign.

After the death of Kumaragupta there was a struggle for control of the throne among the imperial family. This caused a civil war within the empire to break out that initially weakened the central authority in the feudatories and provinces.
The Vakatakas were neighbors of the Guptas invaded Malwa, therefore weakening Guptas authority over regions of central Asia.

The most important cause for the fall of the Gupta empire came from repeated invasions by the Huns. The invasions destroyed the trade of the Guptas with Rome as well as the markets and ports of western India. All this caused the collapse of this great empire in 535 C.E.