I don't know what to tell you. You clearly haven't studied International Affairs, or at least read the scholarly literature. Even some cursory research through Wikipedia citations will bring this up. But in any case, here are some freebies: https://armscontrolcenter.org/why-tactical-nuclear-weapons-a... https://www.armscontrolwonk.com/archive/403540/brodies-weake...

If you have a real interest in this area, a subscription to Foreign Affairs would be useful. Especially during the 20th century that's where all these arguments were hashed out. Tactical nukes were already being publicly debated in the 1950s. You may be able to access many older articles, from Foreign Affairs and others, through a free JSTOR account.