Little Details

I'm writing a novel where one of the main characters is a military priest/chaplain. I've been searching but the internet doesn't seem to have much information as to their ranks or uniforms or general behavior within a military unit because as far as I know, chaplains do have military ranks though I don't really know how that would be applied. Any knowledge regarding military chaplains would be REALLY appreciated.

My co-main character (there are two) is a commissioned officer. The setting of my novel is similar to today's world but with fighting breaking out sporadically in trouble spots all over the world. World War III, I suppose would be a good description though it's ... really that. Anyway. I'm wondering just how quickly a man can rise through the military if he graduated from, say, West Point if I hypothetically make him a very good leader and skilled soldier.

Thank you in advance for the help!

So I have a pair of young children, aged seven and nine, whose (wealthy) parents have died recently and are going from India to Britain because that's where their uncle, who's going to take care of them, is. The part I can't find is what means they'd use to travel and how long it would take - would there be a leg of the journey by boat, by coach, by train? Would it take longer because they're young? They have a nurse to look out for them, so they aren't travelling by themselves. This is early to mid-nineteenth century.

Edit: Thanks everyone who replied - I think I've got enough to go on now.

Would a 30-something Welsh aristocrate in the early 1930s kiss a lady's hand on being introduced to her? Or would he shake it? Or just make a bow and not touch the lady at all?

The character is a military man, well travelled and modern-minded, but his father is a very old-school Welsh nobleman and the character's education on social etiquette took place in the early 20th century, so it is probably pretty traditional. Thanks to Jane Austen, I am aware that the gentleman would make a bow to the lady in the 18th century (shake hands with more intimate acquaintances), and I have the idea that the hand kiss was common in Victorian times, but I didn't find anything on its status in the Edwardian and post-Edwardian period.

I tried googling "1930s", "Edwardian", "social codes", "etiquette", and "hand kiss" in all possible variations, but I guess the question is too specific to find the right answer if you don't know where to look.