ammunition
am·mu·ni·tion
/ˌæmjəˈnıʃən/ noun [ noncount ]
: the objects (such as bullets and shells) that are shot from weapons
The troops were supplied with weapons and ammunition.
— often used figuratively
She had the ammunition to prove her case. [=she had the evidence she needed to prove her case]
His foolish statements provided his opponents with more ammunition to use against him in the campaign.