IIUC, the trains are carrying Guatemalans and not necessarilly Mexicans, thus eliminating any American retaliation on Mexican soil ... even though the two presidents (Mex and Guat) are fomenting the invasion
The topic is militia...... the squad will be all volunteer militia and not associated with any government.
The object is to disrupt rail traffic and thus the human pipeline. If the journey becomes too dangerous for the latrino hobos and too expensive for the railroads, the process might cease.
The objective is offensive action not passive ineffective defense
There was one derailment. perhaps ten more at intervals of 100 or 200 miles will put the fear of God in the travelers and pass a message tothe railroads