The crime of assault varies from state to state (and under federal law), but is generally defined as intentionally putting another person in reasonable apprehension or fear of an imminent (immediate) harmful or offensive contact. The crime of assault may be committed even if there is no physical contact, as the criminal physical contact constitutes the separate crime of battery.

The crime of assault with a deadly weapon (also known as aggravated assault) occurs when someone uses a deadly weapon (gun, knife, club, tire iron, brass knuckles, etc.) during an assault.

In Michigan, assault is defined under Michigan Compiled Laws Section 750.81. It is considered a crime to attempt to cause physical injury to another person or to put them in fear of an imminent battery. Assault does not require physical contact; the mere act of putting someone in fear of harmful or offensive contact is sufficient. Aggravated assault, or assault with a deadly weapon, is a more serious offense and is covered under Michigan Compiled Laws Section 750.82. This occurs when an individual commits an assault with a gun, knife, or any other object that could reasonably be considered a deadly weapon or that could cause serious injury. The penalties for aggravated assault are more severe than for simple assault and can include imprisonment, fines, and a criminal record. It's important to note that the specific circumstances of the incident, such as the intent and the presence of any injuries, can affect the charges and penalties.