Today we seek to resolve a conflict among the lower courts. Some courts have held that, when a trial court sua sponte issues a defensive jury instruction but fails to apply it to a lesser-included offense, the court commits no error unless the defendant objects.
I. FACTS
On August 5, 2011, some time after 2 A.M., Adrian Mendez and several friends arrived at Big Man Diesel Repair. The group had spent the evening socializing and consuming a variety of drugs, including Xanax, cocaine, marijuana, and alcohol. They were later joined by Roger Guzman and Jacob Castillo, who had also been smoking marijuana and drinking alcohol. Soon thereafter, Mendez and Castillo got into a fight. The men exchanged blows until Mendez drew a knife and stabbed Castillo several times. Castillo was hospitalized and, although his initial prognosis was good, he died two months later due to complications from his stab wounds. The State charged Mendez with murder.
A. Trial
At trial, Mendez argued that he had acted in self-defense. Mendez testified that he was afraid of Castillo, claiming that Castillo had gang affiliations and a reputation for violence. Mendez explained that when Castillo arrived at Big Man Diesel Repair that night, he appeared to be intoxicated and agitated. According to Mendez, Castillo started the fight, and Mendez drew his knife only because, based on Castillo's reputation and excited state, he believed Castillo was reaching for a gun.
The jury was instructed that it could find Mendez guilty of either murder or aggravated assault. The trial court also sua sponte charged the jury on the issue of self-defense. The charge, in relevant part, read as follows:
Upon the law of self-defense, you are instructed that a person is justified in using force against another when and to the degree he reasonably believes the force is immediately necessary to protect himself against the other person's use or attempted use of unlawful force.
....
Therefore, if you find from the evidence beyond a reasonable doubt that the defendant, Adrian Aaron Mendez, Jr., did cause the death of Jacob Castillo, as alleged, but you further find from the evidence, as viewed from the standpoint of the defendant at the time, that from the words or conduct, or both of Jacob Castillo it reasonably appeared to the defendant that his life or person was in danger and there was created in his mind a reasonable expectation or fear of death or serious bodily injury from the use of unlawful deadly force at the hands of Jacob Castillo, and that acting under such apprehension and reasonably believing that the use of deadly force on his part was immediately necessary to protect himself against Jacob Castillo's use or attempted use of unlawful deadly force, he stabbed Jacob Castillo, then you should acquit the defendant on the grounds of self-defense ....3
Mendez did not object to this charge. The jury acquitted Mendez of murder, but convicted him of the lesser-included offense of aggravated assault. Mendez was sentenced to seven years' imprisonment and assessed a $10,000 fine.
B. Appeal and Discretionary Review *551On appeal, Mendez complained that the trial court's instruction on self-defense was "erroneous and incomplete."
In its reply brief, the State did not initially contest Mendez's claim of jury charge error; instead, the State sought to rebut Mendez's claim of egregious harm. Only in its motion for rehearing, after the court of appeals had ruled in Mendez's favor, did the State address the existence of jury-charge error vel non .
The First Court of Appeals, in an opinion authored by Chief Justice Radack, disagreed. "[O]nce the trial court included self-defense in the abstract portion of the charge," the court said, self-defense became "law applicable to the case."
The State petitioned this Court to review the court of appeals' conclusion that, by failing to apply the law of self-defense to the lesser-included offense of aggravated assault, the trial court committed jury-charge error. We do not understand the State to object to the court of appeals's harm analysis, but only its ruling that the trial court "erred" at all.
II. LAW
Texas Code of Criminal Procedure Article 36.14 directs the trial judge to *552"deliver to the jury ... a written charge distinctly setting forth the law applicable to the case."
Instead, the defendant's failure to object to jury-charge error affects which of Almanza 's dual standards of review is to apply.
But not every defense-benefitting instruction is "law applicable to the case," such that its exclusion from the charge is necessarily erroneous.
On the other hand, if the trial court undertakes upon its own initiative to instruct the jury on a defensive issue, that issue becomes "law applicable to the case," whether the defendant requested it or objected *553to its absence or not.
IV. ANALYSIS
A. By sua sponte instructing the jury on self-defense, the trial judge assumed the duty to administer that instruction correctly.
In this case, it is uncontested that Mendez never requested a self-defense instruction on the record. The trial judge, then, initially had no duty to charge the jury on the issue of self-defense. If the court's charge had been utterly silent with respect to self-defense, Mendez would have been required to object to any resulting jury-charge error.
But the trial judge did issue a self-defense instruction, evidently sua sponte . So, pursuant to Barrera , the trial judge necessarily "signaled" that self-defense was "law applicable to the case."
B. When self-defense is "law applicable to the case," failing to apply this issue to applicable lesser-included offenses is error.
It is well-settled that "[j]ury charges which fail to apply the law to the facts adduced at trial are erroneous."
Accordingly, we have found jury-charge error where a trial court fails to apply its abstract charge on self-defense to the particular facts of the case at hand.
We have also found error where a trial court includes an application paragraph that is incomplete.
Extrapolating from these cases, we conclude that the absence of an application paragraph as to aggravated assault was erroneous. The jury-charge oversight that occurred in this case may be seen as either (1) a complete "fail[ure] to apply an abstract instruction to the facts of the case" under Barrera ,
The absence of an instruction applying self defense to aggravated assault may also be viewed as an incomplete charge under Vega . Pursuant to Vega , the trial court in this case had a duty to "list the specific conditions under which [the] jury [was] authorized to acquit."
*556The State argues that this situation is more like Posey than Barrera -that self-defense applied to aggravated assault was nothing more than a "defensive issue" which, if unrequested by the defense, was simply inapplicable to the case. We disagree. By charging the jury generally upon the law of self-defense, the court "signaled" that that issue was law applicable to the entire case
The State also argues that requiring the trial court to apply self-defense to an unrequested lesser offense would run afoul of Posey 's characterization of defensive issues as "strategic decisions generally left to the lawyer and the client."
IV. CONCLUSION
When the trial court charged the jury on the issue of self-defense in the abstract, it thereby declared that issue to be law applicable to the case. The jury was informed under what circumstances it should convict Mendez of aggravated assault. Self-defense being law applicable to the case meant that the trial court should also have informed the jury under what circumstances it should acquit him of that offense. We affirm the court of appeals' judgment.
See, e.g. , Shackelford v. State , No. 14-04-00633-CR,
See Mendez v. State ,
1 CR at 1126-28.
Brief for Appellant in the First Court of Appeals at 27.
1 CR at 1126-28.
Almanza v. State ,
State's Motion for Rehearing in the First Court of Appeals at 2-3.
State's Motion for Rehearing in the First Court of Appeals at 3.
Mendez ,
See State's Petition for Discretionary Review at 8 ("The court of appeals erred by holding that there was charge error[.]").
Tex. Code Crim. Proc. art. 36.14 ("Charge of court").
Delgado v. State ,
See Almanza ,
E.g. , Posey ,
E.g. , Barrera ,
Vega ,
Vega ,
Barrera ,
Vega ,
See, e.g. , Gray v. State ,
Id. at 127-28 (quoting Ex parte Chandler ,
Williams v. State ,
Vasquez v. State ,
See Barrera ,
Id. at 416.
See Vega ,
Barrera ,
Vega ,
See, e.g. , Tolbert ,
Gray ,
See
Vega,
See Tex. Penal Code §§ 2.03, 9.02.
Vega,
Alonzo v. State ,
Vega ,
Barrera ,
Williams ,
See Alonzo ,
Posey ,
