WWFUNfun

Portugal actually entered the war in 1916, which makes their decision almost the oddest of all. Actually watching a year of trench warfare and then saying "Yeah, gotta get me some of that sweet sweet candy!" Bizarre.

Admittedly, Germany declared war on them, but they'd provoked it by seizing German ships in Lisbon harbour. Apparently the motivation was that they were afraid that, neutral or no neutral, their colonies would be divvied up at the peace conference if they weren't on the winning side.

And in the end they only lost a couple of thousand dead, hardly a rounding error in the total butcher's bill. But even so.