Use the Recon List to examine the board
(
by holding the mouse over different hex tiles).

With only $20 left, what commands can you make
that would protect your invasion force at A5
and also counter the ARMOR at B3?

You could purchase a TRAP to A5, and another TRAP to Braxx.
OR
You could move your force at A5 to another open hex near Axia,
and purchase a TRAP or ARMOR to Braxx.
(
Although you'd risk stumbling into ARMOR near Axia,
you'd be in a more aggressive position on the next turn.)