Netanyahu and Gallant have long had a divisive working relationship, and over the past year there have been reports of shouting matches between the two men over Israel's war strategy.
Gallant has said a hostage release deal with Hamas should be prioritised ahead of continuing the war in Gaza, a position rejected by the PM.
The former defence minister has also been unhappy at plans to continue to allow Israel's Ultra Othrodox citizens to be exempt from serving in the military.
Months before the start of the war in Gaza in October 2023, Netanyahu had fired Gallant over political differences, before reinstating him following major public outcry.
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