"To make the pledge" means to formally promise or commit to doing something. It could involve vowing to support a cause, fulfill a responsibility, or abide by certain rules or principles.
Sentences with «to make the pledge»
Mortgage lenders, for example, need you to make any pledge on your home as collateral for your loan. (debtfirms.com)
Leading businesses are making these pledges in good faith but they are only voluntary and not yet universal. (theconversation.com)
Surely a Liberal leader wouldn't make a pledge and then do the absolute, exact opposite? (labour-uncut.co.uk)