His foolish statements provided his opponents with more 'ammunition' to use against him in the campaign.
She had the 'ammunition' to prove her case. [=she had the evidence she needed to prove her case]
The troops were supplied with weapons and 'ammunition'.
(..) have come from anywhere. It's a shame you had to fly all the way out here to figure that out. How did you all escape this? The expenditure of ammunition. Is that how you tweaked your leg? No, shit's been bugging me a while. This prick stands right in the mix, while seven or eight of them (..)2013 World War Z