Well-written, thought-provoking articles about the USA and its current woes (some are more polemical than others, but I have an anti-rant filter): 

1. 15th August, Nick Bryant in The Age.
2. 6th August, Wade Davis in RollingStone
3. 23rd July, Fintan O'Toole in The Atlantic
4. 24th June, Tom McTague in the New York Review of Books
5. 3rd June, Max Boot in The Washington Post

How and why the Australian government intends to spend $575 billion on defence over the next ten years. (With a projected annual expenditure of $73 billion by 2030, up from about $40 billion today.) here to edit. The new Defence Strategic Update.

Some commentaries:

1. Michael Shoebridge
2. From The Guardian: Allan Behm, Ashley Townshend, and Brendan Thomas-Noone.
3. ​From Joseph Camilleri, there's this and this. 
4. Mark Beeson
5. Geoffrey Barker
6. John Lee 

Useful data (follow the links) from Marcus Hellyer (ASPI). 

Paul Dibb has an essay on the recently released Russian outline of its nuclear deterrence policy. It's inevitably a bit general and vague, but still: "This is the first time in the almost 30-year history of the Russian Federation that an explanation of Russia’s nuclear warfighting policy has been made public."

Kingston Reif from the Bulletin of the Atomic Scientists has an interesting article looking at  spending on the US nuclear arsenal, with links to take the reader deeper into the debate.

Hans Kristensen and Matt Korda have provided a good overview of world nuclear warhead numbers for the Federation of American Scientists. The links in the endnotes provide interesting details.

Another good article by Max Boot in The Washington Post: 'Trump’s nuclear brinkmanship keeps backfiring, but he keeps doubling down'.