Simplified: The president has authority as commander in chief to respond to immediate military threats before a declaration of war but is not supposed to initiate...
Simplified: When debating Israel’s war in Gaza jus ad bellum is satisfied Hamas’s attacks on Oct 7 2023 gave Israel the legal right to respond with military force
Simplified: Russia’s war in Ukraine would be lawless even if Putin confined himself to airstrikes against military targets and if his troops behaved scrupulously