http://wikiless.i2p/w/index.php?title=Dominican_Civil_War&action=edit§ion=5&lang=en
On June 15, the Constitutionalists launched a second and final attempt to expand the boundaries of their stronghold. In the bloodiest battle of the intervention, the rebels began their attack on U.S. outposts. Using the greatest firepower yet, they used tear gas grenades, .50-caliber machine guns, 20 mm guns, mortars, rocket launchers, and tank fire.