Just because the colonial British were not able to digest the fact that Semiramis, a world conqueror failed miserably at the borders of India, she was simply relegated to mythology. Had she won the round, it would have benifited their propaganda – India, a country trivialized by anyone an everyone. An account of her failed attack on India below –

A long period of peace ensued, till she resolved to subjugate the Indians on hearing that they were the most numerous of all nations, and possessed the largest and most beautiful country in the world. For two years preparations were made throughout her whole kingdom ; in the third year she collected in Bactria 3,000,000 foot soldiers, 500,000 horsemen, and 100,000 chariots. Beside these, 100,000 camels were covered with the sewn skins of black oxen, and each was mounted by one warrior ; these animals were intended to pass for elephants with the Indians. For crossing the Indus 2000 ships were built, then taken to pieces again, and the various parts packed on camels.
Stabrobates, the king of the Indians, awaited the Assyrians on the bank of the Indus. He also had prepared for the war with all his power, and gathered together even a larger force from the whole of India. When Semiramis approached he sent messengers to meet her with the complaint that she was making war upon him though he had done her no wrong ; and in his letter he reproached her licentious life, and calling the gods to witness, threatened to crucify her if victorious. Semiramis read the letter, laughed, and said that the Indians would find out her virtue by her actions. The fleet of the Indians lay ready for battle on the Indus. Semiramis caused her ships to be put together, manned them with her bravest warriors, and, after a long and stubborn contest, the victory fell to her share. A thousand ships of the Indians were sunk and many prisoners taken. Then she also took the islands and cities on the river, and out of these she collected more than 100,000 prisoners. But the king of the Indians, pretending flight, led his army back from the Indus; in reality he wished to induce the enemy to cross the Indus. As matters succeeded according to her wishes, Semiramis caused a large and broad bridge to be thrown skilfully over the Indus, and on this her whole army passed over. Leaving 60,000 men to protect the bridge, she pursued the Indians with the rest of her army, and sent on in front the camels clothed as elephants. At first the Indians did not understand whence Semiramis could have procured so many elephants and were alarmed. But the deception could not last. Soldiers of Semiramis, who were found careless on the watch, deserted to the enemy to escape punishment, and betrayed the secret. Stabrobates proclaimed it at once to his whole army, caused a halt to be made, and offered battle to the Assyrians. When the armies approached each other the kind of the Indians ordered his horsemen and chariots to make the attack. Semiramis sent against them her pretended elephants. When the cavalry of the Indians came up their horses started back at the strange smell, part of them dislodged their riders, others refused to obey the rein. Taking advantage of this moment, Semiramis, herself on horseback, pressed forward with a chosen band of men upon the Indians, and turned them to flight. Stabrobates was still unshaken; he led out his elephants, and behind them his infantry. Himself on the right wing, mounted on the best elephant, he chanced to come opposite Semiramis.
He made a resolute attack upon the queen, and was followed by the rest of the elephants. The soldiers of Semiramis resisted only a short time. The elephants caused an immense slaughter ; the Assyrians left their ranks, they fled, and the king pressed forward against Semiramis ; his arrow wounded her arm, and as she turned away his javelin struck her on the back. She hastened away, while her people were crushed and trodden down by their own numbers ; and at last, as the Indians pressed upon them, were forced from the bridge into the river. As soon as Semiramis saw the greater part of her army on the nearer bank, she caused the cables to be cut which held the bridge ; the force of the stream tore the beams asunder, and many Assyrians who were on the bridge were plunged in the river. The other Assyrians were now in safety, the wounds of Semiramis were not dangerous, and the king of the Indians was warned by signs from heaven and their interpretation by the seers not to cross the river. After exchanging prisoners Semiramis returned to Bactra. She had lost two-thirds of her army.