Joe Biden:
Supported wars in Iraq & Afghanistan, but not Iran. 
US should stand up to aggression of dictators. 

Cory Booker:
End intervention in Yemen & Iran, but not Israel. 

Pete Buttigieg:
Be more judicious when committing troops. 
U.S. not the guarantor of peace in Afghanistan. 
Pull troops out of Afghanistan, but not Syria.

Julian Castro:
Don't entangle ourselves in wars, but rebuild alliances. 
Withdraw US troops from Syria. 
Opposed troops in Syria, but have to plan withdrawal. 

John Delaney:
Withdraw military aid from Saudi forces fighting in Yemen. 

Tulsi Gabbard:
No regime change in Iran; no war in Yemen. 
End US support for Saudi-led conflict in Yemen. 
Use military to fight terrorists, not for regime change. 
Opposes fighting in Afghanistan & Syria; end arms to Saudis. 
 No more wars for regime change, like Syria and Afghanistan. 

Kamala Harris:
Ok with Israeli settlements in Palestinian territory. 
Time for a political solution in Afghanistan. 

Jay Inslee:
Opposed war in Iraq; opposed use of torture. 

Amy Klobuchar:
Supported regime change in Libya; supports Israeli military.
Keep US military presence in Syria.  

Beto O`Rourke:
Discuss U.S. policy in Syria in a more meaningful way. 

Bernie Sanders:
Cut military spending, except F-35 at Vermont air base. 
End Syrian conflict; pull out U.S. troops.  

Andrew Yang:
Limited foreign intervention; restore Congress's role in war. 
Repeal post-9/11 Authorization for Use of Military Force.

Source: OnTheIssues.org