Countries REALLY don't want to go to DC and ask for a dollar swap line. One nation just did (according to WSJ) and it is one of the most critical redistribution centers in the eurodollar system. While the usual suspects go on about "dedollarization" and petroyuans, over here in the real world the consequences from lack of oil flow include a shortfall of dollars as much as oil.

Eurodollar University Money & Macro Analysis

U.A.E. Asks U.S. About a Wartime Financial Lifeline
https://www.wsj.com/world/middle-east/u-a-e-asks-u-s-for-a-wartime-financial-lifeline-3f9ea3a0

Qatar Warns of ‘Huge’ Economic Fallout From War in Coming Months
https://www.bloomberg.com/news/articles/2026-04-15/qatar-warns-of-huge-economic-fallout-from-war-in-coming-months