It is possible to move a general to attack sector 5 and then use single-unit (1R) blocks on the adventure, moving out from sector 5.
Send the generals in quick succession, no waiting for drums.
Sector 6:
http://prntscr.com/vv6ebf
Sector 4:
http://prntscr.com/vv6dpx
Sector 3:
http://prntscr.com/vv6e0p
Sector 2:
http://prntscr.com/vv6ebf