Question: When did the Incan Empire gain prominence?
About the article "Peru", section "History".

Candidate passages:
The Ichma (Yschma) culture was a pre-Incan indigenous culture, located south of Lima, Peru in the Lurin valley.
It later spread north, into the Rimac valley.
The Ichma culture was formed around 1100 AD, following the breakup of the Wari Empire.
It lasted until around 1440 AD, when they were absorbed into the Incan empire. 
The Inca Army was a multi-ethnic army charged with defending the sovereignty of the Incan Empire, expanding its borders, and putting down rebellions.
It was also often used for political purposes, such as executions or coups.
As the Incan Empire grew in size and population, the army did the same.
At the height of the empire (under the reigns of Tupac Yupanqui and Huayna Capac), the army grew to approximately 200,000 men.
The militaristic nature of the Incan monarchy caused great emphasis to be placed on the army and the position of the common soldier.
Soldiers were given food and clothing and state aid was also provided for a soldier's family to ensure that agricultural production did not suffer due to the absence of a productive worker.
For these reasons full-time soldiers were held in high regard and they even occupied their own position in the socio-political pyramid.
When the army returned to Cuzco following a successful campaign they were received by women and children as heroes in a ceremony held in their honor.
The ceremony took place in the Plaza de Armas in Cuzco and consisted of exhibiting the plunder and parading the prisoners as a symbol of the victory. 
In 1530, de Soto became a "regidor" of León, Nicaragua.
He led an expedition up the coast of the Yucatán Peninsula searching for a passage between the Atlantic Ocean and the Pacific Ocean to enable trade with the Orient, the richest market in the world.
Failing that, and without means to explore further, de Soto, upon Pedro Arias Dávila's death, left his estates in Nicaragua.
Bringing his own men on ships which he hired, de Soto joined Francisco Pizarro at his first base of Tumbes shortly before departure for the interior of present-day Peru.
Pizarro quickly made de Soto one of his captains.
When Pizarro and his men first encountered the army of the Inca Atahualpa at Cajamarca, Pizarro sent de Soto with fifteen men to invite Atahualpa to a meeting.
When Pizarro's men attacked Atahualpa and his guard the next day (the Battle of Cajamarca), de Soto led one of the three groups of mounted soldiers.
The Spanish captured Atahualpa.
De Soto was sent to the camp of the Incan army, where he and his men plundered Atahualpa's tents.
During 1533, the Spanish held Atahualpa captive in Cajamarca for months while his subjects paid for his ransom by filling a room with gold and silver objects.
During this captivity, de Soto became friendly with Atahualpa and taught him to play chess.
By the time the ransom had been completed, the Spanish became alarmed by rumors of an Incan army advancing on Cajamarca.
Pizarro sent de Soto with 200 soldiers to scout for the rumored army.
While de Soto was gone, the Spanish in Cajamarca decided to kill Atahualpa to prevent his rescue.
De Soto returned to report that he found no signs of an army in the area.
After executing Atahualpa, Pizarro and his men headed to Cuzco, the capital of the Incan Empire.
As the Spanish force approached Cuzco, Pizarro sent his brother Hernando and de Soto ahead with 40 men.
The advance guard fought a pitched battle with Incan troops in front of the city, but the battle had ended before Pizarro arrived with the rest of the Spanish party.
The Incan army withdrew during the night.
The Spanish plundered Cuzco, where they found much gold and silver.
As a mounted soldier, de Soto received a share of the plunder that made him very wealthy; it represented riches from Atahualpa's camp, his ransom, and the plunder from Cuzco.
On the road to Cuzco, Manco Inca Yupanqui, a brother of Atahualpa, had joined Pizarro.
Manco had been hiding from Atahualpa in fear of his life, and was happy to gain Pizarro's protection.
Pizarro arranged for Manco to be installed as the Inca leader.
De Soto joined Manco in a campaign to eliminate the Incan armies who had been loyal to Atahualpa.
By 1534, de Soto was serving as lieutenant governor of Cuzco while Pizarro was building his new capital (which later became known as Lima) on the coast.
In 1535 King Charles awarded Diego de Almagro, Francisco Pizarro's former business partner, the governorship of the southern portion of the Incan Empire.
Pizarro and de Almagro quarreled over which governorship Cuzco was in.
When de Almagro made plans to explore and conquer the southern part of the Incan empire (Chile), de Soto applied to be his second-in-command, offering a large payment for the position, but de Almagro turned him down.
De Soto packed up his treasure and returned to Spain in 1539 
Cusi is a 20th-century Incan boy who lives in a high mountain valley with an old llama herder named Chuto.
Chuto raised Cusi in a traditional Incan fashion, although the Spanish culture was prevalent in Peru since the conquest of the Incan Empire.
Although eager for adventure, Cusi is still drawn to the home he has known all his life.
Cusi sets out from his home to try to find a family. 
The Incan Empire spread across the north western parts of South America between 1200 and 1573, ruled over by a monarch addressed as the "Sapa Inca", "Sapa", or "Apu".
The civilization emerged in the Kingdom of Cusco, and expanded to become the "Ttahuantin-suyu", or "land of the four sections", each ruled by a governor or viceroy called "Apu-cuna", under the leadership of the central "Sapa Inca".
The empire eventually fell to the Spanish in 1533, when the last king, Atahualpa, was captured and executed on 29 August.
The conquerors installed other Incan kings– beginning with Atahualpa's brother, Túpac Huallpa– and the line continued in this manner until the death of Túpac Amaru in 1572.