It can only be called an invasion.
And as such (according to the Constitution) the primary role of the Federal government and the military is to defend the Republic.
The Caravan was apparently organized by US citizens.
Coming from Honduras, the country with the 2nd highest Murder Rate in the World, thousands are attempting to force their way into the USA.
|Rank||Country||Rate per 100,000||Murders in 2016|
When thousands of people are marching on your border waving the flag of their country, it’s called an Invasion.pic.twitter.com/TI2bhktziE
— Will Westcott (@westland_will) October 19, 2018