useless trivia: What Word Means: An Eritrean Sandal?

Questions

The first U S marines wore high leather collars to protect their necks from sabres, hence the term __________?

The football huddle originated at what university?

The force that brings moving bodies to a halt is _________?

The Fort George Point in Belize City was formed by the silt runoff of what hurricane?

The four throwing events at the olympics are shotput, discus, javelin & ______?