Married under the joint motto , tanto monta , monta tanto , the two young monarchs were initially obliged to fight a civil war against PERSON@1 , princess of LOCATION@1 -LRB- also known as PERSON@2 la LOCATION@2 -RRB- , the purported daughter of PERSON@3 , and were swiftly successful .

The two young monarchs had initially to fight a civil war against PERSON@2 , princess of LOCATION@1 -LRB- also known as PERSON@2 la LOCATION@2 -RRB- , the purported daughter of PERSON@3 .
