The Offences against the Person Act 1861 creates the offences of:

Common assault and battery: a summary offence, under section 42;
Aggravated assault and battery: a summary offence, under section 43
Common assault: under section 47
Assault occasioning actual bodily harm: under section 47The Criminal Justice (Miscellaneous Provisions) Act (Northern Ireland) 1968 creates the offences of:

Assault with intent to resist arrest: under section 7(1)(b); this offence was formerly created by s.38 of the OAPA 1861.That Act formerly created the offence of Assault on a constable in the execution of his duty. under section 7(1)(a), but that section has been superseded by section 66(1) of the Police (Northern Ireland) Act 1998 (c.32) which now provides that it is an offence for a person to, amongst other things, assault a constable in the execution of his duty, or a person assisting a constable in the execution of his duty. United States
In the United States, assault may be defined as an attempt to commit a battery. However, the crime of assault can encompass acts in which no battery is intended, but the defendants act nonetheless creates reasonable fear in others that a battery will occur.Four elements were required at common law:
The apparent, present ability to carry out;
An unlawful attempt;
To commit a violent injury;
Upon another.As the criminal law evolved, element one was weakened in most jurisdictions so that a reasonable fear of bodily injury would suffice. These four elements were eventually codified in most states.
Assault (or common assault) is committed if one intentionally or recklessly causes another person to apprehend immediate and unlawful personal violence. Violence in this context means any unlawful touching, though there is some debate over whether the touching must also be hostile. The terms "assault" and "common assault" often encompass the separate offence of battery, even in statutory settings such as s 40(3)(a) of the Criminal Justice Act 1988. A common assault is an assault that lacks any of the aggravating features which Parliament has deemed serious enough to deserve a higher penalty. Section 39 of the Criminal Justice Act 1988 provides that common assault, like battery, is triable only in the magistrates court in England and Wales (unless it is linked to a more serious offence, which is triable in the Crown Court). Additionally, if a defendant has been charged on an indictment with assault occasioning actual bodily harm (ABH), or racially/religiously aggravated assault, then a jury in the Crown Court may acquit the defendant of the more serious offence, but still convict of common assault if it finds common assault has been committed. Aggravated assault
An assault which is aggravated by the scale of the injuries inflicted may be charged as offences causing "actual bodily harm" (ABH) or, in the severest cases, "grievous bodily harm" (GBH). Assault occasioning actual bodily harm
The offence of is created by section 47 of the Offences against the Person Act 1861. Inflicting grievous bodily harm
Also referred to as "malicious wounding" or "unlawful wounding".