Worry is a useless mulling over of things we cannot change.
Before the tongue can speak it must have lost the power to wound.
You do have to change things as warfare changes.
May He who is the Brahman of the Hindus the Ahura-Mazda of the Zoroastrians the Buddha of the Buddhists the Jehovah of the Jews the Father in Heaven of the Christians give strength to you to carry out your noble idea.