A Hicksville man was charged with assault Thursday after, Nassau police said, he threatened a man and his 4-year-old daughter with a bat and knocked the child down during a dispute that began when the victim “slapped” the defendant’s vehicle to alert him he might strike them as he backed up.

David A. Wallach, 19, of Atlas Lane is scheduled to be arraigned Friday at First District Court in Hempstead on charges of second-degree assault, second-degree menacing, fourth-degree criminal possession of a weapon, second-degree criminal mischief and endangering the welfare of a child.

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His attorney could not be reached for comment.

Second Squad detectives said the 12:40 p.m. incident began as a 34-year-old man, whom they declined to identify, and his 4-year-old daughter were walking along Atlas Lane. The dad tapped the vehicle Wallach was backing out of a driveway to make him aware of their presence behind him.

Police said Wallach jumped out of the vehicle holding a baseball bat, which the dad wrestled from him. But police added that Wallach pushed the daughter during the scuffle, knocking her down and causing injuries to her back and neck.

Police said Wallach then went to the victim’s home and tossed baseballs at the house, breaking two windows, after which Wallach shoved the victim’s wife into a car when she came outside to investigate the commotion.

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When officers arrived at the scene, they found Wallach standing in the street and placed him under arrest, police said. The couple’s daughter was taken to a hospital for treatment.