system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Wars]How did the Galactic Republic manage to fund such a fast military build up?

And also how was it feasible to maintain such a massive military? I mean between losing such large tax paying corporations to the seperatists, and constant warfare that would affect trade for several decades. It seems difficult to maintain a economy under these conditions.
gpt
The initial buildup of manpower and hardware was conducted over a period of at least a decade by a third party contractor outside of Republic space.  This Grand Army of the Republic was built in secret, creating the illusion of spectacularly rapid militarization when this military asset was finally revealed and deployed.  Securing such a deal before the economic blow of the substantial tax losses would be eminently feasible; the corruption prevalent in the Republic at this time would also allow it to be done in secret.

After the Supreme Chancellor received Emergency Powers from Sen. Binks, he was in a strong legal position to secure defense taxes from planets which had remained (often coerced) within the Republic's fold.