September 9.
The colonial government of New Spain heard glimmerings of the Queretaro conspiracy.
The conspiracy aimed to overthrow the rule of the Peninsulares and their replacement by Criollos.
The pretext for the insurrection was the fear that the Peninsulares would turn the rule of Mexico over to the French.
 The tentacles of the conspiracy had spread from the city of Queretaro throughout the Bajio region.
 The conspirators included military officers Ignacio Allende and Juan Aldama, the Roman Catholic priest Miguel Hidalgo, and the Mayor (Corregidor) of Queretaro, Miguel Dominguez, and his wife Josefa Ortiz de Dominguez, called "la Corregidora."
Hidalgo was selected as the leader of the conspiracy, partially because it was believed he could attract the mestizos and indigenous people of the Bajio to the cause.
The date planned for the beginning of the insurrection was October 2.

September 15.
La Corregidora in Queretaro learned  the government had begun arresting conspirators.
She sent messengers, Ignacio Perez and Juan Aldama, to Dolores, some 85 kilometres (53 mi) distant, to warn Hidalgo.
 Allende was visiting Hidalgo in Dolores.

September 16.
At 2 a.m. Hidalgo and Allende were awakened by Aldama and advised that the conspiracy was in danger of being quashed by the government.
Meeting with other conspirators, they decided to initiate the revolt immediately.
In the early morning Hidalgo rang the church bells, assembled his followers to worship, and made a speech, the "grito" or Cry of Dolores, which set in motion the Mexican War of Independence.
 Hidalgo affirmed support for King Ferdinand VII and demanded the end of economic abuses by peninsulares.
Accounts differ as to whether he called for the full independence of Mexico from Spain.
Hidalgo and his followers, 500 to 800 men, took over Dolores and advanced southward.
By nightfall, they took control of San Miguel de Allende, home town of Allende and Aldama.
Along the way Hidalgo raised a banner with an image of the Virgin of Guadalupe, who became the symbolic leader of the insurgency.

September 19.
Outside the city of Celaya, Hidalgo and Allende sent a letter to the city government threatening to "cut the throats of seventy-eight Europeans" held prisoners if the insurgent army was fired upon.

September 24.
The Bishop of Michoacan excommunicated Hidalgo, Allende, Aldama, and Mariano Abasolo.

September 28.
Conquering cities and gathering more men as he marched, Hidalgo and his army of 25,000, primarily indigenous people and mestizos, defeated the defenders of Guanajuato City, storming the fortified granary (Alhóndiga de Granaditas).
 They sacked the city and slaughtered many inhabitants.

October 25.
In support of Hidalgo, a mestizo priest, José María Morelos, started a military campaign to expel the Spaniards from the state of Guerrero.
This came to be called "Morelos' First Campaign."
Initially he had only 25 men, but he quickly added many more as he progressed.
Unlike Hidalgo, Morelos invested time and effort in training his men.
He imposed strict discipline and forbade looting.

October 30.
Marching toward Mexico City with a disorganized army of 60 to 80 thousand men, Hidalgo defeated a much smaller royalist army in the Battle of Monte de las Cruces.
With his army in the outskirts of Mexico City, Hidalgo inexplicably ordered a retreat.
The insurgent army had suffered heavy casualties in the battle and many desertions afterwards and failed to gain much support from the Criollos, indigenous people, and mestizos in and near the capital city.

November 7.
With an army reduced to about 40,000 men, Hidalgo was defeated by a royalist army of 7,000 at Aculco.

November 9.
José Antonio Torres, a mestizo, secured the surrender of Guadalajara, the second city of Mexico, to insurgent forces.

November 19.
Ignacio Allende proposed to Hidalgo that the insurgents concentrate their forces in Guanajuato.
He said that the royalist forces were advancing and public opinion "may shortly be converted into a hatred for us and for our government."
Hidalgo ignored Allende's recommendation and
September 9. The colonial government of New Spain heard glimmerings of the Queretaro conspiracy. The conspiracy aimed to overthrow the rule of the Peninsulares and their replacement by Criollos. The pretext for the insurrection was the fear that the Peninsulares would turn the rule of Mexico over to the French.  The tentacles of the conspiracy had spread from the city of Queretaro throughout the Bajio region.  The conspirators included military officers Ignacio Allende and Juan Aldama, the Roman Catholic priest Miguel Hidalgo, and the Mayor (Corregidor) of Queretaro, Miguel Dominguez, and his wife Josefa Ortiz de Dominguez, called "la Corregidora." Hidalgo was selected as the leader of the conspiracy, partially because it was believed he could attract the mestizos and indigenous people of the Bajio to the cause. The date planned for the beginning of the insurrection was October 2.
September 15. La Corregidora in Queretaro learned  the government had begun arresting conspirators. She sent messengers, Ignacio Perez and Juan Aldama, to Dolores, some 85 kilometres (53 mi) distant, to warn Hidalgo.  Allende was visiting Hidalgo in Dolores.
September 16. At 2 a.m. Hidalgo and Allende were awakened by Aldama and advised that the conspiracy was in danger of being quashed by the government. Meeting with other conspirators, they decided to initiate the revolt immediately. In the early morning Hidalgo rang the church bells, assembled his followers to worship, and made a speech, the "grito" or Cry of Dolores, which set in motion the Mexican War of Independence.  Hidalgo affirmed support for King Ferdinand VII and demanded the end of economic abuses by peninsulares. Accounts differ as to whether he called for the full independence of Mexico from Spain. Hidalgo and his followers, 500 to 800 men, took over Dolores and advanced southward. By nightfall, they took control of San Miguel de Allende, home town of Allende and Aldama. Along the way Hidalgo raised a banner with an image of the Virgin of Guadalupe, who became the symbolic leader of the insurgency.
September 19. Outside the city of Celaya, Hidalgo and Allende sent a letter to the city government threatening to "cut the throats of seventy-eight Europeans" held prisoners if the insurgent army was fired upon.
September 24. The Bishop of Michoacan excommunicated Hidalgo, Allende, Aldama, and Mariano Abasolo.
September 28. Conquering cities and gathering more men as he marched, Hidalgo and his army of 25,000, primarily indigenous people and mestizos, defeated the defenders of Guanajuato City, storming the fortified granary (Alhóndiga de Granaditas).  They sacked the city and slaughtered many inhabitants.
October 25. In support of Hidalgo, a mestizo priest, José María Morelos, started a military campaign to expel the Spaniards from the state of Guerrero. This came to be called "Morelos' First Campaign." Initially he had only 25 men, but he quickly added many more as he progressed. Unlike Hidalgo, Morelos invested time and effort in training his men. He imposed strict discipline and forbade looting.
October 30. Marching toward Mexico City with a disorganized army of 60 to 80 thousand men, Hidalgo defeated a much smaller royalist army in the Battle of Monte de las Cruces. With his army in the outskirts of Mexico City, Hidalgo inexplicably ordered a retreat. The insurgent army had suffered heavy casualties in the battle and many desertions afterwards and failed to gain much support from the Criollos, indigenous people, and mestizos in and near the capital city.
November 7. With an army reduced to about 40,000 men, Hidalgo was defeated by a royalist army of 7,000 at Aculco.
November 9. José Antonio Torres, a mestizo, secured the surrender of Guadalajara, the second city of Mexico, to insurgent forces.
November 19. Ignacio Allende proposed to Hidalgo that the insurgents concentrate their forces in Guanajuato. He said that the royalist forces were advancing and public opinion "may shortly be converted into a hatred for us and for our government." Hidalgo ignored Allende's recommendation and 
Timeline of Mexican War of Independence