Question: What empire of Persia did the person who defeated the Agalassoi conquer?

full_context: Document 1: Persian Empire: The Persian Empire (Persian: شاهنشاهی ایران, translit. "shāhanshāhi-ye irān", lit. 'Imperial Iran') is one of a series of imperial dynasties centered in Iran (formerly known as Persia in the Western world until 1935). Persia was in power from 550 B.C. until 330 B.C. The first of these was the Achaemenid Empire established by Cyrus the Great in 550 BC with the conquest of Median, Lydian and Babylonian empires. It covered much of the Ancient world when it was conquered by Alexander the Great. Persia was then ruled by the Parthian Empire, which supplanted the Hellenistic Seleucid Empire, and then by the Sassanian Empire, which ruled up until the mid-7th century.
Document 2: Old Kandahar: Old Kandahar (locally known as Zorr Shaar; Pashto: زوړ ښار‎ , meaning "Old City") is a historical section of the city of Kandahar in southern Afghanistan. It is thought its foundation was laid out by Alexander the Great in 330 BC under the name Alexandria Arachosia. and served as the local seat of power for many rulers in the last 2,000 years. It became part of many empires, including the Mauryans (322 BC–185 BC), Indo-Scythians (200 BC–400 AD), Sassanids, Arabs, Zunbils, Saffarids, Ghaznavids, Ghorids, Timurids, Mughals, Safavids, Hotakis and others. It was one of the main cities of Arachosia, a historical region sitting between Greater Iran and the Indus Valley Civilization. The city has been a frequent target for conquest because of its strategic location in Southern Asia, controlling the main trade route linking the Indian subcontinent with the Middle East, Central Asia and the Persian Gulf.
Document 3: Bara Bandai: Bara Bandai (Urdu: برہ بانڈئی‎ ; Pashto: بره بانډۍ‎ ) is a village in Pakistan, known as an area crossed by Alexander The Great during his invasion. Ashfaq khan is nazim & Rahmat Ali is naib nazim of VC bara bandai 2•
Document 4: Arachosia: Arachosia is the Hellenized name of an ancient satrapy in the eastern part of the Achaemenid, Seleucid, Parthian, Greco-Bactrian, and Indo-Scythian empires. Arachosia was centred on the Arghandab valley in modern-day southern Afghanistan, although its influence extended east to as far as the Indus River in modern-day Pakistan. The main river of Arachosia was called "Arachōtós", now known as the Arghandab River, a tributary of the Helmand River. The Greek term "Arachosia" corresponds to the Aryan land of "Harauti" which was around modern-day Helmand. The Arachosian capital or metropolis was called Alexandria Arachosia or Alexandropolis and lay in what is today Kandahar in Afghanistan. Arachosia was a part of the region of ancient Ariana.
Document 5: Battle of the Uxian Defile: The Battle of Uxian Defile was fought by Alexander the Great against the Uxian tribe of the Persian Empire. The battle raged on the mountain range between the key Persian cities of Susa and Persepolis. Persepolis was the ancient capital of the Persian Empire and held a symbolic value among the native Persian population. They believed that if this city were to fall into enemy hands, then, in effect, the whole Persian Empire would fall into the hands of the enemy.
Document 6: Azemilcus, King of Tyre: Azemilcus ('zmlk\) was the King of Tyre during its siege by Alexander the Great in 332 BC. Alexander had already peacefully taken Byblos and Sidon, and Tyre sent envoys to Alexander agreeing to do his bidding. His response was to declare that he wished to enter the city to sacrifice to Melqart, known to Alexander as the Tyrian Herakles. Azemilcus was with the Persian fleet at the time, and the Tyrians, unsure who would win the war, responded by saying that they would obey any other command but that neither Persians nor Macedonians could enter the city. When Alexander finally captured the city, Azemilcus and various other notables, including envoys from Carthage, had taken refuge in the temple of Melqart, and Alexander spared their lives.
Document 7: First Persian invasion of Greece: The first Persian invasion of Greece, during the Persian Wars, began in 492 BC, and ended with the decisive Athenian victory at the Battle of Marathon in 490 BC. The invasion, consisting of two distinct campaigns, was ordered by the Persian king Darius I primarily in order to punish the city-states of Athens and Eretria. These cities had supported the cities of Ionia during their revolt against Persian rule, thus incurring the wrath of Darius. Darius also saw the opportunity to extend his empire into Europe, and to secure its western frontier.
Document 8: Hindu and Buddhist heritage of Afghanistan: Before the Islamic conquest of Afghanistan communities of various religious and ethnic background lived in the land. South of the Hindu Kush was ruled by the Zunbil and Kabul Shahi rulers. When the Chinese travellers (Faxian, Song Yun, Xuanzang, Wang-hiuon-tso, Huan-Tchao, and Wou-Kong) visited Afghanistan between 399 and 751 AD, they mentioned that Buddhism was practiced in different areas between the Amu Darya (Oxus River) in the north and the Indus River in the south. The land was ruled by the Kushans followed by the Hephthalites during these visits. It is reported that the Hephthalites were fervent followers of medieval Hinduism, and that they worshipped Hindu aspects of God, known as Shiva and Vishnu, as well as Surya.
Document 9: Indian campaign of Alexander the Great: The Indian campaign of Alexander the Great began in 326BC. After conquering the Achaemenid Empire of Persia, the Macedonian king (and now the great king of the Persian Empire), Alexander, launched a campaign into the Indian subcontinent. The rationale for this campaign is usually said to be Alexander's desire to conquer the entire known world, which the Greeks thought ended in India.
Document 10: Mongol invasion of India, 1306: In 1306, the Chagatai Khanate ruler Duwa sent an expedition to India, to avenge the Mongol defeat in 1305. The invading army included three contingents led by Kopek, Iqbalmand, and Tai-Bu. To the check the invaders' advance, the Delhi Sultanate ruler Alauddin Khalji dispatched an army led by Malik Kafur, and supported by other generals such as Malik Tughluq. The Delhi army achieved a decisive victory, killing several thousands of the invaders. The Mongol captives were brought to Delhi, where they were either killed or sold into slavery.
Document 11: Xerxes I: Xerxes I ( ; Old Persian: 𐎧𐏁𐎹𐎠𐎼𐏁𐎠</a> x-š-y-a-r-š-a (   ) "ruling over heroes", <a href="Ancient%20Greek">Greek</a> Ξέρξης ] ; 518–465 BC), called Xerxes the Great, was the <a href="List%20of%20kings%20of%20Persia%23Achaemenid%20Empire%20%28550%E2%80%93330%20BC%29">fourth</a> <a href="king%20of%20kings">king of kings</a> of the <a href="Achaemenid%20Empire">Achaemenid dynasty <a href="Persia">Persia</a>. Like his predecessor Darius I, he ruled the empire at its territorial apex. He ruled from 486 BC until his assassination in 465 BC at the hands of Artabanus, the commander of the royal bodyguard.
Document 12: Philip II of Macedon: Philip II of Macedon (Greek: Φίλιππος Β΄ ὁ Μακεδών , "Phílippos II ho Makedṓn"; 382–336 BC) was the king (Basileus) of the Ancient Greek kingdom of Macedon from 359 BC until his assassination in 336 BC . He was a member of the Argead dynasty of Macedonian kings, the third son of King Amyntas III of Macedon, and father of Alexander the Great and Philip III. The rise of Macedon during the reign of Philip II was achieved in part by his reformation of the Ancient Macedonian army, establishing the Macedonian phalanx that proved critical in securing victories on the battlefield. After defeating Athens and Thebes at the Battle of Chaeronea in 338 BC, Philip II led the effort to establish a federation of Greek states known as the League of Corinth, with him as the elected hegemon and commander-in-chief of a planned invasion of the Achaemenid Empire of Persia. However, his assassination led to the immediate succession of his son Alexander, who would go on to invade the Achaemenid Empire in his father's stead.
Document 13: Siege of Tyre (332 BC): The Siege of Tyre was orchestrated by Alexander the Great in 332 BC during his campaigns against the Persians. The Macedonian army was unable to capture the city, which was a strategic coastal base on the Mediterranean Sea, through conventional means because it was on an island and had walls right up to the sea. Alexander responded to this problem by first blockading and besieging Tyre for seven months, and then by building a causeway that allowed him to breach the fortifications.
Document 14: Phoenicia under Hellenistic rule: The Persian Empire, including modern Lebanon, eventually fell to Alexander the Great, king of Macedonia. He attacked Asia Minor, defeated the Persian troops in 333 BC, and advanced toward the Lebanese coast. Initially the Phoenician cities made no attempt to resist, and they recognized his suzerainty. However, when Alexander tried to offer a sacrifice to Melqart, Tyre's god, the city resisted. Alexander besieged Tyre in retaliation in early 332 BC. After seven months of resistance, the city fell, and its people were sold into slavery (See Siege of Tyre (332 BC)). Despite his early death in 323 BC, Alexander's conquest of the eastern Mediterranean Basin left a Greek imprint on the area. The Phoenicians, being a cosmopolitan people amenable to outside influences, adopted aspects of Greek civilization with ease.
Document 15: Agalassoi: The Agalassoi were a tribe that lived in modern Pakistan in the lower Indus Valley at the time of Alexander the Great. During Alexander's invasion of India, the Agalassoi were defeated in battle by the Macedonian army.
ground_truth: Achaemenid Empire