There are several reasons why the reinforce troop button might be missing at times:
- For technical reasons, the reinforce button on your Archipelago screen disappears after scouting a player. So make sure to reinforce your troops before you go scout the next opponent
- Additionally, the button will not appear after conquering a Resource Base
- Whenever you unlock an additional Landing Craft, you will need to fill the new Landing Craft once before the reinforce button appears again. This is because the system wouldn’t know what troops you’d like the new LC to be filled with.