This question got me thinking
Did any Muggle (full blown "pure blood" Muggle with no magic; not Squib nor any wizard with majority Muggle relatives) actively fight against Voldemort?
Many of the witches and wizards that fought in the BoH (Battle of Hogwarts) were the husbands, wives, relatives or children of Muggles.
These Muggles were not completely oblivious of the wizard world unlike general Muggles. They would definitely be worried if their loved ones were targeted by or involved in any way with Voldemort, and possibly try anything in their power to help them.
Has there been any instance of a Muggle actively fighting against Voldemort? By this I don't mean giving passive help (for eg, Tonks' father, who was a Muggle, allowing Harry to stay in his house until he could be moved to the Burrow in DH), but actively fighting Voldemort, DE, going around raising awareness about Voldemort, etc? Has that ever happened in canon (books PS to DH) or the extended universe (Pottermore, interviews, twitter, movies, etc)? Since the answer will possibly be short, we can include both WW (Wizard War) I and II.
(If there are any instances of a Muggle actively fighting for Voldemort, that can be included too. I am just assuming nothing like that could ever happen, as Voldemort would probably never recruit a Muggle.)