it is said the allies won WW1 by staying in a stalemate of trench warfare. and holding the axis powers at bay, till the u.s came with fresh soldiers and so it made an impact.
The Vietnam War was fought between South Vietnam and North Vietnam. The U.S. aided South Vietnam while North Vietnam was aided by the communist Soviet Union. The war was at a stalemate for awhile even with the help of the U.S. on the South's side. The U.S. left the war due to public discontent. Two years later North Vietnam conquered South Vietnam, and they became a united nation again.
Don't know if you still need this, but here is an answer:
There was little separation of church and state in the middle ages. Besides being royal or having a title, some of the highest ranks in society you could achieve were within The Church.
Additionally, performing certain rites and receiving different ordinances were some of the key ways monarchs could keep up appearances and have a positive reputation with their citizens and peers.
