One map includes a "mud-frozen ground timeline", assessing ground conditions across eastern Ukraine as spring progresses.
After a winter that has tested Ukraine's air defences to the limit, there's also a sobering analysis of Kyiv's diminishing air defence capability, as it seeks to balance its limited resources to protect civilians, critical infrastructure and its frontline troops.
Not only do the leaked documents say a lot about the state of Ukraine's military - they also talk about some of Washington's other allies. From Israel to South Korea, the documents reveal internal debates those countries are having about Ukraine and other sensitive issues.
Some of the documents are marked top secret, others to be shared only with America's closest intelligence allies.
How much of this is new?
A lot of the detail here is familiar. There's just a lot more of it, and it's all in one place.Take casualty figures. It comes as little surprise to learn that the US estimates that between 189,500 and 223,000 Russian soldiers have been killed or wounded.
The equivalent figure for Ukraine's losses - between 124,500 and 131,000 - is also in line with ballpark figures briefed to journalists in recent weeks.
In both cases, the Pentagon says it has "low confidence" in the figures, due to gaps in information, operational security and deliberate attempts, probably by both sides, to mislead.
Ukraine war: Who leaked top secret US documents - and why?
Almost 100 US defence department documents have been leaked - and it is unclear who will benefit.
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