Did the idea of the manifest destiny actually cause events such as the political support territorial expansion or simply justify actions taken for other reasons

The answer is yes. The Manifest Destiny made happen proceedings more willingly than justifying actions taken for other explanations. This is seen when unlawful tenant and farmers are seen occupied over individuals they see as "substandard" (Native Americans and Mexicans).

How  did spanish  power increaseunder charles  v and philip ii? in 1519,charles  v inherited a huge empire. he became king of  spain  and was also the heir to the hapsburg empire. during his 42-year reign, philip worked to expand  spanish  influence, strengthen the catholic church, and make his own power absolute. hope this !

They most like influence us an there self