Where does “ipinaglaban” come from?

ipinaglaban (Tagalog) comes from Tagalog ipaglaban, from Tagalog ipag-, from Tagalog pag-, from Tagalog kapag, from Tagalog kapagka — if.

Ancestry of “ipinaglaban”, step by step

Step	Language	Word	Meaning
1	Tagalog	ipaglaban	to be fought for; to be advocated for
2	Tagalog	ipag-	to perform the action of the verb for somebody;...
3	Tagalog	pag-	Used to form verbal nouns from verbs prefixed...
4	Tagalog	kapag	if
5	Tagalog	kapagka	if