- Altogether, per publicly available data released by the U.S. government, 11 states plus the District of Columbia have each exported over $100 million in weapons for Saudi Arabia and the UAE. Altogether, up to $6.8 billion in bombs, rocket launchers, machine guns and other weapons are mapped below using open source data provided by the U.S. government.
The top five states for these goods (excluding the District of Columbia’s $737 million in exports) are North Carolina, Arizona, Alabama, Pennsylvania and Arkansas. Rounding out the remaining spots are New Mexico, Maryland, Florida, Massachusetts, Virginia, and New Hampshire.
Some of these exports may be linked to alleged war crimes. Building on previous reporting by Bellingcat, identifying marks on U.S. bombs used in the Dahyan bus bombing which killed at least 40 children and 11 adults, revealed that they were partially produced in Pennsylvania, the fifth largest exporter of weapons to Saudi Arabia and the UAE. Parts found at incidents lead to manufacturers in Texas, showing that even small exporters can have an outsized role in possible human rights violations.
I don't know enough about the current situation in the middle east to know if the term "proxy war" is applicable.
edit: It appears it's open support by way of veto, I should really keep up with the news more.