The Invasion plans are a quest item used during the The Grand Tree quest. Players obtain it by using Glough's key on the locked chest in Glough's home just south of the Grand Tree.
The invasion plans read as follows:
“ | Invasion
Troops board three fleets of battleships at Karamja Fleet 1 Fleet 2 Fleet 3 Take no prisoners! |
” |
Along with the lumber order, players should take this to King Narnode Shareen as evidence against Glough.