In a previous article titled “The Opet Festival of Ancient Egypt: Has it  been derived from the Jagannatha Rathyatra of Puri, India?” I had pointed  out the many similarities between Amun, the all-powerful Creator god of the ancient  Egyptians (with his primary center of worship at Thebes), and Krishna, the  Supreme Creator of the Vedic Indians. Both of them were blue-complexioned, wore  “feathers in their head-dress” and were depicted with a “sacred river” emerging  from their feet. In addition, the grand Opet festival of the ancient Egyptians,  which was celebrated over a period of 24-27 days during the season of the  flooding of the Nile, is identical in form and spirit to the Jagannath Rathyatra  festival that is still celebrated every year at the tiny coastal town of Puri,  India. The worship of Krishna (or Jagannath) and the observance of the  Rathyatra festival are quintessentially Vedic festivals, which have been  observed for thousands of years prior to the establishment of the cult of Amun  at Thebes (as per the information contained in many Sanskrit texts). This  implies that the Vedic triad of divinities – Krishna, Balarama and Subhadra –  must have been transferred from India to Egypt sometime prior to the beginning  of the New Kingdom in c. 1550 BC.
On further investigation I found many  more similarities between these two ancient deities – Amun and Krishna. A  number of hymns from the ancient Coffin  Texts of Egypt associate Amun with the falcon-headed god Horus, while in  Hindu myths Krishna is associated with the eagle-headed deity Garuda, who acts  as his vahana i.e. carrier. Even the  etymology of the name Amun has close associations with Krishna. In Egyptian,  Amun is written as Ymn, which has  been reconstructed by Egyptologists to “Yamanu”, and sometimes also spelled as  “Yamun”. “Yamanu” or “Yamun” is very closely related to the sacred river  “Yamuna” in India, which is intimately tied up with the childhood of Krishna,  who grew up on the banks of the river Yamuna. The waters of the Yamuna are of a  dark-blue color, which has been likened to the complexion of Krishna, and the  river is regarded as the source of love, compassion and spiritual capabilities.  It is possible that the Egyptian Ymn may actually be a reference to the Yamuna, which became shortened to Yamun, and  subsequently to Amun.
Even at a metaphysical level,  Amun and Krishna are very similar. Amun was regarded as the “hidden one”, and  the epithet, "he whose name is hidden", was frequently applied to  him. Amun’s form was “unknown”, and it was said that no-one could behold or  understand him, except Amun himself.  The  Boulaq Papyrus from the XVIII Dynasty (1552-1295 BC) describes Amun as the  “Greatest in Heaven…Lord of all, who is in all things.” Amun abides in all;  everything happens in him, and nothing exists outside him. He is the Supreme  Creator: “The One maker of all things, Creator and Maker of beings, From Whose  eyes mankind proceeded, From Whose mouth the Gods were created.” He was, “The  One Whose forms are greater than every God, In Whose Beauty the Gods  jubilate.”  Amun was also the “champion  of the poor” and he became the “personal savior” of anyone who took him into  his heart.
“[Amun] who comes at the voice of  the poor in distress, who gives breath to him who is wretched…You are Amun, the  Lord of the silent, who comes at the voice of the poor; when I call to you in  my distress You come and rescue me.” 
The same epithets are also  associated with Krishna. Krishna is “karuna seendhu” (sea of compassion) and  “deena bandhu” (the friend of the poor), who responds to a devotee’s call  instantly, as exemplified in the Mahabharata, when he was invoked by Draupadi. In the Bhagavad  Gita, Krishna asks Arjuna to regard him as his only protector, for, he  says, “Remembering me, you shall overcome all difficulties through my grace.”  Krishna, like Amun, abides in the heart of all creatures as the indestructible  “Self”, and his “unknowable form” pervades the entire cosmos. The birth and  dissolution of the cosmos itself take place in Krishna: “There is nothing that exists separate from me,  Arjuna. The entire universe is suspended from me as my necklace of jewels” .  Although, Krishna remains unknowable and invisible, the multifarious celestial  beings of this created world reflect his various divine attributes: “Wherever  you find strength, or beauty, or spiritual power, you may be sure that these  have sprung from a spark of my essence.”  Yet, no-one could understand the real nature of Krishna, for Arjuna tells  Krishna, “Neither gods nor demons know your real nature. Indeed, you alone know yourself, O Supreme  Spirit.”  This is similar to the Egyptian texts which assert that no-one could behold or  understand Amun, except Amun himself. Krishna further confirms this: “I know  everything about the past, the present, and the future, Arjuna; but there is no  one who knows me completely” . 
In fact, the entire Theban triad  of Amun, Mut and Khonsu, are related to the triad of divinities – Krishna, Balaram  and Subhadra - worshipped at the Jagannath temple at Puri, India. Krishna’s  brother, the fair-skinned Balaram, is considered to be an incarnation of  “Ananta-Sesha” - the primeval serpent of the abyss, in whose coils Vishnu rests  in the middle of the cosmic Milky Ocean. Ananta-Sesha is himself a powerful  agent of creation, and he co-exists with Vishnu at the beginning and end of the  creative cycle. We find the same imagery associated with Khonsu, the son of  Amun. On one of the walls at Karnak, a cosmogony is depicted in which Khonsu is  described as the “Great Snake who fertilizes the Cosmic Egg in the creation of the world” (Wikipedia). In addition, Mut (who is believed to  have been the wife of Amun), and Subhadra, the sister of Krishna, were both  regarded as manifestations of the great mother goddess.
  
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    | Fig 1: Krishna, Balaram and Subhadra - The Puri Triad. Subhadra is in the center, flanked by the dark-complexcioned Krishna and the fair-complexioned Balarama, on either side. Source: Wikipedia. | Fig 2: Amun, Mut and Khonsu- The Theban Triad. Khonsu is in the center, flanked by the dark-complexioned Amun and the fair-complexioned Mut. Source: www.kenseamedia.com | 
But the question  is how did an entire pantheon of deities, along with associated ceremonies,  rites and rituals migrate from India to Egypt, at a time when the existing pantheon and religious beliefs of the  Egyptians was already well formulated? What historical events could have led  to this?
In order to  understand this sudden influx of Vedic beliefs into the religious practices of  the ancient Egyptians, it is important to recount a critical event that took  place before the beginning of the New Kingdom in Egypt i.e. prior to 1550 BC.  Sometime during 1700 BC, Egypt had been overrun by a group of irreligious,  nomadic invaders known as the Hyskos (which means “rulers of foreign countries”). The term was chiefly used during  the Middle Kingdom to refer to the nomadic Semitic tribes of Canaan and Syria.  As per the Egyptian accounts, the Hyskos had burnt the Egyptian cities to the  ground, destroyed all their temples and had led their women and children into  slavery. This was a time of great suffering for the Egyptian people. During  this time, the Egyptian pharaohs had been forced to retreat south, driven into  the neighbouring kingdom of Kush (Nubia), which was also referred to as  “Ethiopia” by the classical Greek historians (although this region now falls  within the boundaries of modern Sudan). The pharaoh Ahmose secured the favor of  the Kushites by marrying Nefertari, the black princess of Ethiopia. She was of  a very dark complexion, and was the most  venerated woman in all of Egyptian history. Egyptologist George Rawlinson,  in his book  Ancient Egypt, says about King Ahmose (referred to as  Aahmes):
“He married a  princess, who took on the name of Nefet-ari-Aahmes, or “the beautiful companion  of Aahmes,” and who is represented on the monuments with pleasing features, but  a complexion of ebon blackness. It is certainly wrong to call her a “negress;”  she was an Ethiopian of the best physical type; and her marriage with Aahmes  may have been based upon a political motive. The Egyptian Pharaohs from time to  time allied themselves with the monarchs of the south, partly to obtain the aid  of Ethiopian troops in their wars, partly with a view of claiming, in the right  of their wives, dominion over the Upper Nile region. Aahmes may have been the  first to do this; or he may simply have followed the example of his predecessors,  who, forced by the Hyksos to the south, had contracted marriages with the  families of Ethiopian rulers.”
Armed with the  financial and military help of the Kushites, the Hyskos invaders of Egypt were  finally evicted from the country after 200 years of occupation. During this  time, the pharaohs Kamose and Ahmose had fought under the banner of their  new-found god: Amun. This event, which took place at around 1550 BC, signified  the beginning of the 18th dynasty, which is acknowledged as the  greatest royal family of Egypt. Ahmose became the first pharaoh of the 18th  dynasty. Amun became the supreme protector god of the monarchy and the state,  and his priesthood gained immense power. Magnificent temple complexes dedicated  to Amun were established in Karnak. Since Amun came to the aid of the  Egyptian people at the time of their greatest distress and ignominy, his cult  became all powerful, and dwarfed all the other gods and goddesses of the  Egyptian pantheon.
This historical  event indicates that the worship of Amun must have passed on to Egypt from the  ancient Kushites of Ethiopia. The 18th dynasty pharaohs continued to  maintain strong matrimonial connections with their Kushite neighbours, and  Kushite priests held sway at the temple complex at Karnak. But if that were the  case, then how did the worship of Jagannath make its way to ancient Kush from  India?
  
    |  | Fig 3: Map of Africa in 400 BC, showing the    kingdom of Kush and its neighbouring countries. The river Nile flows through    Kush and Egypt. Kush was also known as Nubia (The Land of Gold). |