Update on the "arsenal bug": The bug has been fixed, so it's now possible for new players to progress in the game again. There will also be a compensation for your trouble
For everyone who's stuck at level 3: "Build the barracks" is supposed to show up instead of the "build the arsenal" mission. The Iron Rage team knows about it and they're fixing it
@junior555 The percentage indicates the chance of getting the reward for the completion of the expedition. All expeditions have several ambushes. Sunken battleship (level 8-15) and Abandoned outpost (level 15-30) are usually easy to complete without losses with decent premiums and you will get back all troops that come back healthy. Bunker behind the waterfall (level 20-30) will have level 8 troops, so that one isn't recommended for starters