Russian forces have not managed to secure Ukraine yet.
Ukrainians are putting up a fight in different locations including in Kyiv and Kharkov and Russian forces have suffered setbacks in some of these clashes.
The matter of concern is what will happen in the cities.
Seems like it.
NATO had to secure following cities while attempting to occupy Iraq in 2003:
Nasiriyah
en.wikipedia.org
Iraq War 2003-Battle of Nasiriyah : Initially, the U.S. 1st Marine Division fought through the Rumaila oil fields, and moved north to Nasiri...
secondgulfwar.blogspot.com
Najaf
en.wikipedia.org
The Battle of Najaf was a major battle in the 2003 invasion of Iraq. The first stage of the battle was fought when the US 3rd Infantry Divi...
secondgulfwar.blogspot.com
Basra
en.wikipedia.org
AOAV's report on the use of explosive weapons in the early stage of the Iraq war focuses on the UK in the battle of Basra, 2003
aoav.org.uk
Baghdad
en.wikipedia.org
Fall of Baghdad-April 2003 : Three weeks into the invasion, US-led Coalition forces moved into Baghdad. Units of the Iraqi Special Republic...
secondgulfwar.blogspot.com
Based on reporting that was a finalist for the Pulitzer…
www.goodreads.com
Kenneth M. Pollack, The Battle for Baghdad, The National Interest, No. 103 (September/October 2009), pp. 8-17
www.jstor.org
British forces fought in Basra while American forces fought in other cities.
NATO military maneuvers in Iraq in 2003 are documented in following link:
Iraqi insurgents were able to regroup in Fallujah but American forces cleared this city in 2004:
Fallujah
en.wikipedia.org
William Head, The Battles of Al-Fallujah, Air Power History, Vol. 60, No. 4 (WINTER 2013), pp. 32-51
www.jstor.org