#Who was Abner?

Abner was the son of Ner, commander of Saul's army. [2:8]

#What did Abner do to Ishbosheth, the son of Saul?

Abner took Ishbosheth and brought him to Mahanaim; he made Ishbosheth king over Gilead, Asher, Jezreel, Ephraim, Benjamin, and over all Israel. [2:8-9]