1 files changed, 6 insertions, 4 deletions

diff --git a/rules.js b/rules.js
index 43a689c..b10868b 100644
--- a/rules.js
+++ b/rules.js
@@ -5599,10 +5599,12 @@ function can_moving_force_siege_or_assault() {
 	let where = moving_piece_space();
 	if (has_besieged_enemy_fortifications(where)) {
 		let commanding = find_friendly_commanding_leader_in_space(where);
-		let cmd_rank = leader_command(commanding);
-		let ldr_rank = leader_command(leader);
-		if (ldr_rank === cmd_rank && force_has_supplied_drilled_troops(leader)) {
-			return true;
+		if (commanding > 0) {
+			let cmd_rank = leader_command(commanding);
+			let ldr_rank = leader_command(leader);
+			if (ldr_rank === cmd_rank && force_has_supplied_drilled_troops(leader)) {
+				return true;
+			}
 		}
 	}
 	return false;