Not great, but Heartbreak Ridge had military action in Grenada. Entertaining. Just thought it deserved a mention.
Here's the IMDB top 50 "war" movies if anyone wants to investigate some that they might not have seen. Half of these are not really war movies (African Queen?), but oh well:
<TABLE cellSpacing=0 cellPadding=0 width="100%" border=0><TBODY><TR><TD vAlign=top align=middle width="10%">1</TD><TD>
Schindler's List (1993) 8.8/10 (94756 votes)</TD></TR><TR><TD vAlign=top align=middle width="10%">2</TD><TD>
Lawrence of Arabia (1962) 8.6/10 (30859 votes)</TD></TR><TR><TD vAlign=top align=middle width="10%">3</TD><TD>
Paths of Glory (1957) 8.5/10 (13714 votes)</TD></TR><TR><TD vAlign=top align=middle width="10%">4</TD><TD>
Apocalypse Now (1979) 8.5/10 (62107 votes)</TD></TR><TR><TD vAlign=top align=middle width="10%">5</TD><TD>
Boot, Das (1981) 8.4/10 (27810 votes)</TD></TR><TR><TD vAlign=top align=middle width="10%">6</TD><TD>
Pianist, The (2002) 8.4/10 (29101 votes)</TD></TR><TR><TD vAlign=top align=middle width="10%">7</TD><TD>
Bridge on the River Kwai, The (1957) 8.4/10 (21478 votes)</TD></TR><TR><TD vAlign=top align=middle width="10%">8</TD><TD>
Battaglia di Algeri, La (1965) 8.4/10 (1696 votes)</TD></TR><TR><TD vAlign=top align=middle width="10%">9</TD><TD>
Taegukgi hwinalrimyeo (2004) 8.4/10 (1159 votes)</TD></TR><TR><TD vAlign=top align=middle width="10%">10</TD><TD>
Hotel Rwanda (2004) 8.4/10 (3570 votes)</TD></TR><TR><TD vAlign=top align=middle width="10%">11</TD><TD>
General, The (1927) 8.4/10 (6870 votes)</TD></TR><TR><TD vAlign=top align=middle width="10%">12</TD><TD>
Great Escape, The (1963) 8.3/10 (19150 votes)</TD></TR><TR><TD vAlign=top align=middle width="10%">13</TD><TD>
Saving Private Ryan (1998) 8.3/10 (96547 votes)</TD></TR><TR><TD vAlign=top align=middle width="10%">14</TD><TD>
To Be or Not to Be (1942) 8.3/10 (3361 votes)</TD></TR><TR><TD vAlign=top align=middle width="10%">15</TD><TD>
Vita è bella, La (1997) 8.3/10 (36426 votes)</TD></TR><TR><TD vAlign=top align=middle width="10%">16</TD><TD>
Grande illusion, La (1937) 8.2/10 (4775 votes)</TD></TR><TR><TD vAlign=top align=middle width="10%">17</TD><TD>
Bronenosets Potyomkin (1925) 8.2/10 (5709 votes)</TD></TR><TR><TD vAlign=top align=middle width="10%">18</TD><TD>
All Quiet on the Western Front (1930) 8.2/10 (6480 votes)</TD></TR><TR><TD vAlign=top align=middle width="10%">19</TD><TD>
Braveheart (1995) 8.2/10 (88778 votes)</TD></TR><TR><TD vAlign=top align=middle width="10%">20</TD><TD>
Kumonosu jô (1957) 8.2/10 (2961 votes)</TD></TR><TR><TD vAlign=top align=middle width="10%">21</TD><TD>
Stalag 17 (1953) 8.2/10 (7318 votes)</TD></TR><TR><TD vAlign=top align=middle width="10%">22</TD><TD>
Patton (1970) 8.1/10 (14185 votes)</TD></TR><TR><TD vAlign=top align=middle width="10%">23</TD><TD>
Untergang, Der (2004) 8.1/10 (3542 votes)</TD></TR><TR><TD vAlign=top align=middle width="10%">24</TD><TD>
Hotaru no haka (1988) 8.1/10 (6324 votes)</TD></TR><TR><TD vAlign=top align=middle width="10%">25</TD><TD>
Full Metal Jacket (1987) 8.1/10 (46132 votes)</TD></TR><TR><TD vAlign=top align=middle width="10%">26</TD><TD>
Deer Hunter, The (1978) 8.1/10 (27457 votes)</TD></TR><TR><TD vAlign=top align=middle width="10%">27</TD><TD>
African Queen, The (1951) 8.1/10 (13801 votes)</TD></TR><TR><TD vAlign=top align=middle width="10%">28</TD><TD>
Glory (1989) 8.1/10 (21533 votes)</TD></TR><TR><TD vAlign=top align=middle width="10%">29</TD><TD>
Life and Death of Colonel Blimp, The (1943) 8.0/10 (1008 votes)</TD></TR><TR><TD vAlign=top align=middle width="10%">30</TD><TD>
Platoon (1986) 8.0/10 (33584 votes)</TD></TR><TR><TD vAlign=top align=middle width="10%">31</TD><TD>
Gone with the Wind (1939) 8.0/10 (28230 votes)</TD></TR><TR><TD vAlign=top align=middle width="10%">32</TD><TD>
Andrei Rublyov (1969) 8.0/10 (3024 votes)</TD></TR><TR><TD vAlign=top align=middle width="10%">33</TD><TD>
Spartacus (1960) 8.0/10 (16261 votes)</TD></TR><TR><TD vAlign=top align=middle width="10%">34</TD><TD>
Napoléon (1927) 7.9/10 (834 votes)</TD></TR><TR><TD vAlign=top align=middle width="10%">35</TD><TD>
Mister Roberts (1955) 7.9/10 (3743 votes)</TD></TR><TR><TD vAlign=top align=middle width="10%">36</TD><TD>
From Here to Eternity (1953) 7.9/10 (5763 votes)</TD></TR><TR><TD vAlign=top align=middle width="10%">37</TD><TD>
To Have and Have Not (1944) 7.9/10 (3823 votes)</TD></TR><TR><TD vAlign=top align=middle width="10%">38</TD><TD>
Barry Lyndon (1975) 7.9/10 (11571 votes)</TD></TR><TR><TD vAlign=top align=middle width="10%">39</TD><TD>
Caine Mutiny, The (1954) 7.9/10 (4177 votes)</TD></TR><TR><TD vAlign=top align=middle width="10%">40</TD><TD>
Henry V (1989) 7.9/10 (8036 votes)</TD></TR><TR><TD vAlign=top align=middle width="10%">41</TD><TD>
'Breaker' Morant (1980) 7.9/10 (2597 votes)</TD></TR><TR><TD vAlign=top align=middle width="10%">42</TD><TD>
Killing Fields, The (1984) 7.9/10 (9161 votes)</TD></TR><TR><TD vAlign=top align=middle width="10%">43</TD><TD>
No Man's Land (2001) 7.8/10 (6833 votes)</TD></TR><TR><TD vAlign=top align=middle width="10%">44</TD><TD>
Roma, città aperta (1945) 7.8/10 (1739 votes)</TD></TR><TR><TD vAlign=top align=middle width="10%">45</TD><TD>
Aleksandr Nevsky (1938) 7.8/10 (1661 votes)</TD></TR><TR><TD vAlign=top align=middle width="10%">46</TD><TD>
Sergeant York (1941) 7.8/10 (2169 votes)</TD></TR><TR><TD vAlign=top align=middle width="10%">47</TD><TD>
Last Samurai, The (2003) 7.8/10 (29455 votes)</TD></TR><TR><TD vAlign=top align=middle width="10%">48</TD><TD>
Letyat zhuravli (1957) 7.8/10 (666 votes)</TD></TR><TR><TD vAlign=top align=middle width="10%">49</TD><TD>
Kagemusha (1980) 7.8/10 (3272 votes)</TD></TR><TR><TD vAlign=top align=middle width="10%">50</TD><TD>
MASH (1970) 7.8/10 (14400 votes)</TD></TR></TBODY></TABLE>