| 2026-01-14 | Battle of Vicksburg in the Civil War, e.g. |
| 2025-09-18 | Invader's tactic |
| 2024-03-20 | Prolonged attack |
| 2023-10-17 | Drawn-out military attack |
| 2023-09-12 | Prolonged attack |
| 2022-11-28 | Drawn-out attack |
| 2022-10-04 | Lengthy attack |
| 2022-04-17 | Attack tactic |
| 2022-03-13 | Lay ___ to |
| 2021-10-06 | Genghis Khan tactic |
| 2021-07-24 | Campaign that may involve catapults and trebuchets |
| 2021-05-16 | Alternative to a blitz |
| 2019-03-12 | Military operation that might last for months |
| 2019-02-14 | The Alamo had a famous one |
| 2018-08-05 | Lengthy attack |
| 2018-07-10 | Military action that includes a blockade |
| 2018-06-17 | Battle of Leningrad, e.g. |
| 2018-05-06 | All-out attack |
| 2018-05-01 | Long, drawn-out fight |
| 2018-02-18 | Tactic in a war of attrition |
| 2017-12-24 | W.W. II ordeal at Leningrad |
| 2017-09-09 | Counterpart of a blitz |
| 2017-06-17 | Drawn-out campaign |
| 2017-01-11 | Attack on a walled city, maybe |
| 2016-03-10 | Wait-'em-out strategy |
| 2015-12-01 | Prolonged attack |
| 2015-04-23 | Genghis Khan tactic |
| 2015-03-13 | Lengthy bout |
| 2015-02-15 | Battle of the Alamo, e.g. |
| 2014-09-27 | Challenge for defenders |
| 2013-09-09 | Prolonged attack |
| 2013-08-11 | Military blockade |
| 2012-12-21 | Long bout |
| 2012-08-25 | Kind of mentality |
| 2012-04-09 | Long, drawn-out attack |
| 2012-03-28 | You're being attacked while under it |
| 2011-04-14 | Tactic for Napoleon |
| 2010-03-25 | More than a raid |
| 2009-12-11 | Long period, as of illness |
| 2009-10-04 | Attack tactic |
| 2009-06-17 | Campaign against Troy, e.g. |
| 2009-01-19 | Prolonged attack |
| 2008-09-16 | Assault on Troy, e.g. |
| 2007-02-21 | ___ of Leningrad, 1941-44 |
| 2007-02-12 | Prolonged attack |
| 2007-02-02 | Military operation |
| 2006-08-07 | Long, drawn-out attack |
| 2006-03-02 | Crusades tactic |
| 2006-01-08 | War tactic |
| 2005-10-26 | Assault on Troy, e.g. |
| 2005-06-12 | Drawn-out fight |
| 2005-03-06 | Preattack tactic |
| 2005-03-04 | Long series of troubles |
| 2004-02-17 | Operation at the Alamo |
| 2003-04-26 | More than a 23-Across |
| 2003-04-18 | Warfare tactic |
| 2002-11-02 | Not just a raid |
| 2001-07-26 | Military operation |
| 2000-08-21 | Start of a long battle |
| 2000-07-09 | Attack on a fort, maybe |
| 1998-09-06 | Kind of mentality |
| 1998-05-08 | Long campaign |
| 1997-10-23 | The taking of Troy, e.g. |
| 1997-06-24 | Long bout |
| 1996-01-10 | 1941 Leningrad event |
| 1995-11-18 | Cause of a downfall |
| 1995-09-23 | Beleaguerment |
| 1994-12-05 | Prolonged attack |
| 1994-10-05 | Drawn-out fight |
| 1994-09-01 | See 63-Across |