Question:
According to most sources, Omar was born sometime between 1950 and 1962 in a village in Kandahar Province, Kingdom of Afghanistan (in present-day Kandahar Province or Uruzgan Province). Some suggest his birth year as 1950 or 1953, or as late as around 1966. According to a "surprise biography" published by the Taliban in April 2015, he was born in 1960. His exact place of birth is also uncertain; one possibility is a village called Nodeh near the city of Kandahar.
On 29 July 2015, the Afghan government publicly announced that Mohammed Omar had died in 2013. Pakistani newspaper The Express Tribune reported that a former Afghan Taliban minister and current leadership council member, who spoke on condition of anonymity, said Mullah Omar died from tuberculosis. It was confirmed by a senior Taliban member that Omar's death was kept a secret for two years. It is alleged that Omar was "buried somewhere near the border on the Afghan side". The place of Omar's death is disputed; according to Afghan government sources, he died in a hospital in Karachi, Pakistan. A former Taliban minister stated that Karachi was "Omar's natural destination because he had lived there for quite some time and was as familiar with the city as any other resident." However, this claim has been dismissed by other Taliban members, stating that his death occurred in Afghanistan after his health condition had deteriorated due to "sickness" and that "not for a single day did he go to Pakistan". According to an official statement by Pakistani defence minister Khawaja Asif, "Mullah Omar neither died nor was buried in Pakistan and his sons' statements are on record to support this. Whether he died now or two years ago is another controversy which we do not wish to be a part of. He was neither in Karachi nor in Quetta." Initially, some Taliban members denied that he had died. Other sources considered the report to be speculative, designed to destabilise peace negotiations in Pakistan between the Afghan government and the Taliban. Abdul Hassib Seddiqi, the spokesman for Afghanistan's National Directorate of Security (NDS), said: "We confirm officially that he is dead."  The following day, the Taliban confirmed the death of Omar. Sources close to the Taliban leadership said his deputy, Mullah Akhtar Mansour, would replace him, although with the lesser title of Supreme Leader. Omar's eldest son, Mullah Mohammad Yaqoob, was opposed to Mansour's ascension as leader.  The Taliban splinter group Fidai Mahaz claimed Omar did not die of natural causes but was instead assassinated in a coup led by Mullah Akhtar Mansour and Mullah Gul Agha. The Taliban commander, Mullah Mansoor Dadullah, brother of former senior commander Mullah Dadullah, confirmed that Omar had been assassinated. The leader of Fidai Mahaz, Mullah Najibullah, revealed that due to Omar's kidney disease, he needed medicine. According to Najibullah, Mansour poisoned the medicine, damaging Omar's liver and causing him to grow weaker. When Omar summoned Mansour and other members of Omar's inner circle to hear his will, they discovered that Mansour was not to assume leadership of the Taliban. It was due to Mansour allegedly orchestrating "dishonourable deals." When Mansour pressed Omar to name him as his successor, Omar refused. Mansour then shot and killed Omar. Najibullah claimed Omar died at a southern Afghanistan hide-out in Zabul Province in the afternoon on 23 April 2013. Mullah Mohammad Yaqoob, Mullah Omar's elder son, denied that his father had been killed, insisting that he died of natural causes.  Omar's death brought about condolences from Ajnad al-Kavkaz, Ansar al Furqan, Islamic Front's Ahrar al-Sham, Jaish Muhammad, Jabhat Ansar al Din, Turkistan Islamic Party, Jamaat Ansar al Sunnah, Jaish al Ummah, Jamaat ul Ahrar, Caucasus Emirate, Jaish al-Islam, Nusra, AQAP, and AQIM, and Al-Shabaab.
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Is there a reason they wouldn't know when he died?

Answer:
claimed Omar did not die of natural causes but was instead assassinated in a coup led by Mullah Akhtar Mansour and Mullah Gul Agha.

Answer the question at the end by quoting:

Juan Ponce de Leon (Spanish pronunciation: ['xwan 'ponthe de le'on]; 1474 - July 1521) was a Spanish explorer and conquistador born in Santervas de Campos, Valladolid, Spain in 1474. Though little is known about his family, he was of noble birth and served in the Spanish military from a young age. He first came to the Americas as a "gentlemen volunteer" with Christopher Columbus's second expedition in 1493. By the early 1500s, Ponce de Leon was a top military official in the colonial government of Hispaniola, where he helped crush a rebellion of the native Taino people.
In 1502 the newly appointed governor, Nicolas de Ovando, arrived in Hispaniola. The Spanish Crown expected Ovando to bring order to a colony in disarray. Ovando interpreted this as authorizing subjugation of the native Tainos. Thus, Ovando authorized the Jaragua Massacre in November 1503. In 1504, when Tainos overran a small Spanish garrison in Higuey on the island's eastern side, Ovando assigned Ponce de Leon to crush the rebellion. Ponce de Leon was actively involved in the Higuey massacre, about which friar Bartolome de las Casas attempted to notify Spanish authorities. Ovando rewarded his victorious commander by appointing him frontier governor of the newly conquered province, then named Higuey also. Ponce de Leon received a substantial land grant which authorized sufficient Indian slave labor to farm his new estate.  Ponce de Leon prospered in this new role. He found a ready market for his farm produce and livestock at nearby Boca de Yuma where Spanish ships stocked supplies before the long voyage back to Spain. In 1505 Ovando authorized Ponce de Leon to establish a new town in Higuey, which he named Salvaleon. In 1508 King Ferdinand (Queen Isabella having opposed the exploitation of natives but dying in 1504) authorized Ponce de Leon to conquer the remaining Tainos and exploit them in gold mining.  Around this time, Ponce de Leon married Leonora, an innkeeper's daughter. They had three daughters (Juana, Isabel and Maria) and one son (Luis). The large stone house Ponce de Leon ordered built for his growing family still stands today near the city of Salvaleon de Higuey.

What did he do in Hispaniola?
The Spanish Crown expected Ovando to bring order to a colony in disarray.