Defence from what/whom? If US doesn't start a war at the opposite end of the world " in defence" there was no need.

where do they get money for both moon and war at the same time?

Loans, mostly.

Artemis costs about $4 billion per mission, with around $90 billion already spent. The war in Iran is costing the US about $1 billion per day, so (as of today), $35 billion spent.

The US debt is $39,000 billion ($39 trillion). So, combined, the entire Artemis program and war in Iran represent .32% of the US debt.

how does debt mean anything if u control the ability to mint tokens that u use to pay the debt?

See "inflation". Look at the outcomes of countries who remove controls on printing money (e.g., Zimbabwe, Venezuela).

Issuing US treasury debt to those still willing to buy it.