Creating an impediment to free navigation and attacking ships of other nations are historic acts of war inviting retaliation from aggrieved parties. In fact, we have seen this movie before with tragic consequences.
Back in the day, Iran and Iraq were locked in a war that ultimately incurred 1,000,000+ casualties. Maybe as many as 2MM.
The Iraq v Iran war has been compared to World War I in that two modern armies went at it over a protracted period of time while engaged in static, trench warfare, and human wave attacks. A bit inaccurate as the Iranians used very sound mobile warfare and deep strike air attacks at times.
Massive amounts of soldiers were deployed with the Iraqis striking with six divisions in the first attack. From a troop perspective many campaigns employed forces generally larger than the Allied D-Day operation. Big war.
Professional soldiers have studied this war as it entailed massive tank battles (the Iraqis ended the war with 4,000 tanks — fielding the 4th largest army in the world that they would one day unleash against Kuwait.)