In the later days of 1835, Samuel Maverick and his two friends were held on house arrest in what would one day be called San Antonio, Texas. The Texas Revolution was in full swing and the local Mexican military commander, Gen. Martín Perfecto de Cos, didn't trust the former Americans one bit, holding them prisoner in their own homes. They still somehow managed to inform the incoming Texian army about Mexican movements in the city. On the first day of December, Cos finally allowed the men to leave.
The first thing they did was join the Texian forces and lead an attack on the town.
By the time Maverick and his friends reached the Texians, the army was ready to retreat. Instead, the men offered to lead a series of attacks against their former city. After rousing a few hundred volunteers to join them, they headed back to San Antonio de Bexar. Four days after being forced out of the city, the men were leading attacks against its garrison commander, Gen. Cos. Maverick guided Col. Ben Milam's troops into the city, while Maverick's friend John Smith led the other detachment.
Milam was killed minutes into the fighting and Maverick was forced to lead the rest of the men into the streets and the house-to-house fighting that followed their entrance into the city. For five days, the revolutionaries fought Mexican government regulars in fierce urban combat. The Mexicans would surrender on the sixth day.
Since Milam had fallen early in the fighting, Maverick took his place at the surrender ceremony. He stayed around the San Antonio area, eventually joining the defenders of the Alamo. While in garrison at the famed citadel, Maverick was elected as one of two San Antonio delegates to the Texas Independence Convention. Maverick would not be able to leave the Alamo until March 2, 1836, because it was surrounded by Mexican troops. When he finally got away, the garrison commander, William Travis, begged him to ask the convention for reinforcements.
They would, of course, be too late. The day a special session of the convention was to be held was also the day of the Battle of the Alamo. All of the fort's defenders were then dead. Maverick signed the Texas Declaration of Independence the next day.
He left Texas briefly to get married and have a baby, but soon returned to a state still considered to be in rebellion by the Mexican government. He became the Mayor of San Antonio and joined the city militia to fight off Comanche raids. But raids weren't the biggest threat to San Antonio. Mexico was still bent on recovering its lost land. Eventually, the Mexican Army arrived outside San Antonio. The Anglo citizens of the city mustered a defense but were captured and forcibly marched back to Mexico. Despite being in prison, Maverick was still elected to the Texas Congress. He was released by Mexico the same day as his daughter's birthday, after refusing repeatedly to publicly back Mexico's claim to Texas. He served in the Texas legislature even after annexation by the United States – but none of this is how the word "Maverick" came to have its accepted meaning.
Maverick refused to brand his cattle because he was against the pain it caused the animals. He cared very little for his herd of cattle which was given to him as payment for a debt in lieu of cash. He transferred the care of the herd to a family in another part of Texas. It's said that stragglers from Maverick's herd were often found roaming. The unbranded cows were known as "mavericks" and often returned.